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 -5a + 7a = 9a - 9y - 1 for a in terms of y.
| \(\frac{5}{14}\)y - \(\frac{5}{14}\) | |
| \(\frac{1}{11}\)y + \(\frac{8}{11}\) | |
| 1\(\frac{1}{7}\)y + \(\frac{1}{14}\) | |
| -8\(\frac{1}{2}\)y - 2 |