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 - 9c = 7c + 5z + 4 for c in terms of z.
| -z - \(\frac{2}{7}\) | |
| \(\frac{1}{16}\)z + \(\frac{1}{4}\) | |
| z + \(\frac{2}{11}\) | |
| \(\frac{4}{9}\)z + \(\frac{4}{9}\) |