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 -4c + 10c = 9c - 9z + 1 for c in terms of z.
| -6z + 6 | |
| 1\(\frac{6}{13}\)z - \(\frac{1}{13}\) | |
| -\(\frac{1}{6}\)z + \(\frac{1}{2}\) | |
| \(\frac{4}{5}\)z - \(\frac{9}{10}\) |