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 3c + 3c = 9c + 3z - 9 for c in terms of z.
| -\(\frac{1}{2}\)z + \(\frac{1}{2}\) | |
| -1\(\frac{3}{8}\)z + \(\frac{3}{4}\) | |
| -\(\frac{7}{10}\)z + \(\frac{3}{5}\) | |
| z + 1\(\frac{1}{2}\) |