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 -3b + 9b = -b - 7y + 8 for b in terms of y.
| -9y - 1 | |
| \(\frac{1}{3}\)y - \(\frac{1}{3}\) | |
| 8y - 4 | |
| \(\frac{3}{5}\)y - \(\frac{4}{15}\) |