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