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 + 4c = 6c - 9z - 9 for c in terms of z.
| -6z + 4\(\frac{1}{2}\) | |
| 1\(\frac{2}{3}\)z - 2\(\frac{1}{3}\) | |
| -1\(\frac{3}{13}\)z - \(\frac{3}{13}\) | |
| -13z - 9 |