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