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