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.)
Solve 3a + 8a = 2a - 4y - 7 for a in terms of y.
| 3y - 1 | |
| 16y - 8 | |
| -12y - 7 | |
| \(\frac{1}{2}\)y + 4 |