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 + 9c = -5c + 3z - 9 for c in terms of z.
| z + 1 | |
| -\(\frac{1}{2}\)z - \(\frac{3}{4}\) | |
| -\(\frac{8}{11}\)z - \(\frac{5}{11}\) | |
| \(\frac{5}{13}\)z - \(\frac{7}{13}\) |