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 a - 4a = -7a + 5y + 9 for a in terms of y.
| 1\(\frac{1}{8}\)y + 1\(\frac{1}{8}\) | |
| 17y + 1 | |
| -2y + 2 | |
| -y - 6 |