Solving Equations by Adding or Subtracting Videos - Free Educational Videos for Students in K - 12

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This page provides a list of educational videos related to Solving Equations by Adding or Subtracting. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Solving Equations by Adding or Subtracting.


Ex: Solve One Step Equations With Fraction by Adding or Subtracting


By Mathispower4u

This video provides two examples of how to solve a one step linear equation by adding and subtracting.

One-step equations with addition and subtraction


By Khan Academy

Learn how to solve one-step addition and subtraction equations by adding or subtracting the same thing from both sides of the equation.

One-step addition and subtraction equations with fractions and decimals


By Khan Academy

Learn how to solve one-step addition and subtraction equations by adding or subtracting the same thing from both sides of the equation.

One-step equations with addition and subtraction


By Khan Academy

Learn how to solve one-step addition and subtraction equations by adding or subtracting the same thing from both sides of the equation.

How to Do Geometry | MathHelp.com


By MathHelp.com

This lesson covers one-step addition equations. Students learn that solving an equation for x means isolating the x on one side of the equation. To isolate the x, the following techniques are used. If a number is being added to x, subtract the number from both sides of the equation. If a number is being subtracted from x, add the number to both sides of the equation. If a number is being multiplied by x, divide both sides of the equation by the number. If a number is being divided by x, multiply both sides of the equation by the number.

One-Step Addition Equations | MathHelp.com


By MathHelp.com

This lesson covers number patterns. Students learn to find the next 3 terms in advanced patterns that involve figures, letters, or numbers. For example, to find the next three terms in the pattern A, Z, B, Y, __, __, __, notice that the first and third terms in the pattern, A and B, are the first two letters in the alphabet, so the fifth and seventh terms in the pattern will be the next two letters in the alphabet, C and D. And the second and fourth terms in the pattern, Z and Y, are the last letter and the second-to-last letter in the alphabet, so the sixth term in the pattern will be the third-to-last letter in the alphabet, X. So the next three terms in the pattern A, Z, B, Y, __, __, __ are C, X, and D.

Vectors : adding and subtracting vectors - YouTube


By Adam Beatty

YouTube presents Vectors : adding and subtracting vectors, an educational video resource on math.

Adding and Subtracting Complex Numbers


By mathonpoint

This video explains how to add or subtract complex numbers. Two example problems are completed in a step-by-step manner.

Vectors : adding and subtracting vectors - YouTube


By Adam Beatty

YouTube presents Vectors : adding and subtracting vectors, an educational video resource on math.

Adding and subtracting integers


By MathPlanetVideos

Calculate -3 + (-6) on a number line

Adding and Subtracting Radicals


By MrLovellFord

This algebra video offers more information on adding and subtracting radicals, and includes a sample walkthrough.

Polynomials: Adding and Subtracting


By PatrickJMT

In this video, the instructor defines polynomials, then gives some examples of how to add and subtract polynomials. He works through the steps of example problems to explain how to work add and subject polynomials. His explanations are clear and thorough and it would be easy to follow along as he explains.

One-step equations with addition and subtraction


By Khan Academy

Some quick examples to practice solving a variety of one step equations. All 4 operations (add, subtract, multiple, divide) are paired with variables.

One-step equations with addition and subtraction


By Khan Academy

Learn how to solve this equation: a + 5 = 54������������

Adding and Subtracting Polynomials | MathHelp.com


By MathHelp.com

In this example, notice that each of our variables, x, y, and z, appears in all three equations. To solve this system, we use the addition method. In other words, let’s start with our first two equations, x + y + z = 4, and x – y + z = 2. Notice that if we add these equations together, the +y and –y will cancel out, and we have 2x + 2z = 6. So, in our new equation, 2x + 2z = 6, we’ve eliminated the variable y. Unfortunately, we still haven’t solved for any of our variables. However, if we can create another equation with just x and z in it, then we’ll have a system of equations in two variables, which we can use to solve for x and z. To create another equation with just x and z in it, we need to eliminate y. We can’t add the first and second equations together, because we’ve already done that. However, notice that if we add the first and third equations together, the first equation has a +y and the third equation has a –y, so we’ll be able to eliminate the y. So we have our first equation, x + y + z = 4, and our third equation, x – y – z = 0, and adding them together, notice that the +y – y cancels out, and, as a bonus, the +z – z also cancels out, so we have 2x = 4, and dividing both sides by 2, x = 2. Now, since we know that x = 2, notice that if we plug a 2 in for x in the equation that we created earlier, we can solve for z. And we have 2(2) + 2z = 6, or 4 + 2z = 6, and subtracting 4 from both sides, we have 2z = 2, and dividing both sides by 2, z = 1. So x = 2 and z = 1, and to find the value of y, we simply plug our values of x and z into any of the equations in the original system. Let’s use the first equation, x + y + z = 4. Since x = 2 and z = 1, we plug a 2 in for x and a 1 in for z, and we have 2 + y + 1 = 4, or 3 + y = 4, and subtracting 3 from both sides, y = 1. So x = 2, y = 1, and z = 1, and finally, we write our answer as the ordered triple, x, y, z, or (2, 1, 1).