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