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 5c - 9c = 4c - 9z + 9 for c in terms of z.
| z + 9 | |
| -\(\frac{9}{11}\)z - \(\frac{2}{11}\) | |
| 14z - 4 | |
| -6z + 9 |