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 = 4 and x = 1, what is the value of 7a(a - x)?
| -28 | |
| 504 | |
| 84 | |
| -792 |