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 6b + 3b = -6b + 7z + 9 for b in terms of z.
| 2z - 4\(\frac{1}{2}\) | |
| \(\frac{1}{3}\)z + \(\frac{3}{4}\) | |
| 1\(\frac{3}{4}\)z - \(\frac{3}{4}\) | |
| -2z + 1\(\frac{1}{5}\) |