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 6a - 7a = -4a + 8y - 9 for a in terms of y.
| -2y - 1\(\frac{3}{5}\) | |
| -\(\frac{7}{11}\)y - \(\frac{9}{11}\) | |
| 1\(\frac{1}{2}\)y - \(\frac{9}{10}\) | |
| -8y + 4 |