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 - 2y + 7 for a in terms of y.
| -1\(\frac{1}{2}\)y + \(\frac{1}{2}\) | |
| \(\frac{1}{3}\)y + 1\(\frac{1}{6}\) | |
| -15y + 3 | |
| -y - \(\frac{3}{5}\) |