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