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 -9a + 8a = -3a + 3y + 7 for a in terms of y.
| y + 4 | |
| \(\frac{5}{6}\)y - 1\(\frac{1}{6}\) | |
| y - 4\(\frac{1}{2}\) | |
| 5\(\frac{1}{2}\)y + 3\(\frac{1}{2}\) |