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.)
If a = -3 and x = -7, what is the value of -9a(a - x)?
| 12 | |
| -378 | |
| 108 | |
| -108 |