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 = 3, what is the value of 4b(b - x)?
| 16 | |
| 540 | |
| 4 | |
| 72 |