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 -9a - a = 8a - 8y + 6 for a in terms of y.
| -1\(\frac{8}{9}\)y + \(\frac{7}{9}\) | |
| -\(\frac{1}{9}\)y - \(\frac{2}{9}\) | |
| \(\frac{7}{17}\)y - \(\frac{6}{17}\) | |
| \(\frac{2}{7}\)y - \(\frac{2}{7}\) |