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 b = -1 and x = 2, what is the value of 7b(b - x)?
| 21 | |
| 720 | |
| 24 | |
| -504 |