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 c = -1 and x = 5, what is the value of 3c(c - x)?
| -168 | |
| 18 | |
| 720 | |
| 216 |