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 = 5 and x = -1, what is the value of -7a(a - x)?
| 56 | |
| -210 | |
| -320 | |
| 42 |