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 -2c - 7c = -c + 3z - 9 for c in terms of z.
| -\(\frac{6}{13}\)z + \(\frac{3}{13}\) | |
| -10z + 9 | |
| 2\(\frac{1}{2}\)z + 2\(\frac{1}{2}\) | |
| \(\frac{1}{9}\)z - \(\frac{2}{9}\) |