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 7a - 2a = -9a + y + 9 for a in terms of y.
| \(\frac{8}{11}\)y - \(\frac{9}{11}\) | |
| -\(\frac{4}{5}\)y + \(\frac{1}{5}\) | |
| \(\frac{3}{16}\)y + \(\frac{9}{16}\) | |
| 6y + 4 |