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