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 + 5b = 8b + 9z + 4 for b in terms of z.
| 4z + 4 | |
| 2z + \(\frac{3}{4}\) | |
| z + 2\(\frac{1}{2}\) | |
| \(\frac{3}{10}\)z - \(\frac{3}{5}\) |