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 = 7 and x = -5, what is the value of 3a(a - x)?
| 42 | |
| 32 | |
| 27 | |
| 252 |