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 -7b - b = -9b + 8y - 9 for b in terms of y.
| 4\(\frac{1}{2}\)y - 4\(\frac{1}{2}\) | |
| y - 1 | |
| -4y + 3\(\frac{1}{2}\) | |
| -\(\frac{5}{17}\)y - \(\frac{2}{17}\) |