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