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 7c - c = -2c + 7z + 7 for c in terms of z.
| -10z + 8 | |
| \(\frac{8}{9}\)z + \(\frac{7}{9}\) | |
| \(\frac{1}{13}\)z - \(\frac{8}{13}\) | |
| -2z - 5 |