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 -a + 4a = -7a - 9y - 8 for a in terms of y.
| -2\(\frac{1}{6}\)y - 1\(\frac{1}{3}\) | |
| -\(\frac{8}{13}\)y - \(\frac{1}{13}\) | |
| -\(\frac{1}{6}\)y - \(\frac{5}{6}\) | |
| -\(\frac{2}{7}\)y - \(\frac{6}{7}\) |