When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
Solve -2a + 7a = -3a + 7y - 2 for a in terms of y.
| 1\(\frac{1}{3}\)y - 2 | |
| y - 2 | |
| \(\frac{1}{2}\)y + \(\frac{1}{2}\) | |
| -2y + 7 |