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 - 5c = 9c + z - 4 for c in terms of z.
| -3z + 2 | |
| -3\(\frac{1}{2}\)z - 3\(\frac{1}{2}\) | |
| 1\(\frac{3}{8}\)z - \(\frac{1}{8}\) | |
| -\(\frac{1}{4}\)z - \(\frac{7}{8}\) |