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 + 4c = -8c + 8z - 9 for c in terms of z.
| -3z - 1\(\frac{3}{4}\) | |
| \(\frac{1}{4}\)z - 2\(\frac{1}{4}\) | |
| -\(\frac{5}{7}\)z - \(\frac{2}{7}\) | |
| \(\frac{4}{17}\)z - \(\frac{9}{17}\) |