literal equations and Formulas

Hi, Christine.

Typically in literal equations, the student is asked to solve for one of the variables in the problem. For example, in your equation 7x + 2y = 5, you might have been asked to solve for y. This means you need to isolate the y by the same method you would if you had all numbers.

7x + 2y = 5, Solve for y.

First, get the y-term by itself by subtracting 7x from both sides:

7x + 2y = 5

-7x -7x .

2y = - 7x + 5

Now divide all the terms on both sides by 2:

2y =
- 7x + 5

2 2 2

y = - 7/2 x + 5/2

Hope this helps.