From the course: Learning Algebra: Solving Equations

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Solving addition equations by adding a negative number

Solving addition equations by adding a negative number

From the course: Learning Algebra: Solving Equations

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Solving addition equations by adding a negative number

In this next lesson we're going to continue Solving Addition Equations. And this time we're going to focus on Adding a Negative Number. We're going to continue using the same four steps that we talked about in the last video. So in case you forgot to jot them down, here they are, make sure you jot them down so that you can refer to them as we go through this process again. So our next equation is going to be to Solve for y and this equation is y plus negative 12 equals 15. We're going to start by isolating our variable y on the left hand side of the equation. That means that we need to get rid of this plus negative 12. Which can be a little confusing because of all the signs, but I'm going to show you a trick that will help you solve these equations. We're going to start by bringing down the left hand side exactly as it's written, so it's y plus negative 12. This is another trick that you can do to help you remember that whatever you do to one side, you must do to the other. And that…

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