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 - 9a = 4a + 3y - 4 for a in terms of y.
| 3y - 1 | |
| -\(\frac{13}{16}\)y + \(\frac{3}{16}\) | |
| y + \(\frac{1}{3}\) | |
| -3y - \(\frac{3}{5}\) |