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