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 = -a + 4y + 9 for a in terms of y.
| -\(\frac{4}{5}\)y + 1\(\frac{3}{5}\) | |
| \(\frac{3}{14}\)y - \(\frac{3}{7}\) | |
| -\(\frac{1}{2}\)y + 1\(\frac{1}{2}\) | |
| -\(\frac{6}{11}\)y - \(\frac{2}{11}\) |