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 -9a - 9a = -4a + y - 5 for a in terms of y.
| -2y + 1 | |
| -2y + 4 | |
| -2y + 5 | |
| -3y + 4 |