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 -8a - 4a = 9a - 3y + 7 for a in terms of y.
| -\(\frac{7}{10}\)y + \(\frac{7}{10}\) | |
| -\(\frac{1}{2}\)y - 1\(\frac{1}{4}\) | |
| -\(\frac{1}{17}\)y - \(\frac{7}{17}\) | |
| -13y + 4 |