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 - 9c = 9c + 3z + 1 for c in terms of z.
| -z + 1\(\frac{2}{3}\) | |
| -\(\frac{3}{8}\)z - \(\frac{3}{8}\) | |
| -\(\frac{12}{13}\)z - \(\frac{1}{13}\) | |
| -3z - 3 |