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