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 + 2b = 7b + 7z - 4 for b in terms of z.
| 1\(\frac{1}{3}\)z + \(\frac{2}{3}\) | |
| 2\(\frac{1}{2}\)z - 2 | |
| -\(\frac{1}{13}\)z + \(\frac{5}{13}\) | |
| -2\(\frac{1}{2}\)z + 4\(\frac{1}{2}\) |