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 8a + 7a = 3a - 3y - 8 for a in terms of y.
| -5y - 1 | |
| -2y - 1\(\frac{3}{5}\) | |
| 3\(\frac{1}{2}\)y + 1\(\frac{1}{2}\) | |
| -8y + 6 |