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 = 9c - 6z - 8 for c in terms of z.
| -1\(\frac{1}{10}\)z - \(\frac{9}{10}\) | |
| 1\(\frac{7}{8}\)z + 1\(\frac{1}{8}\) | |
| -1\(\frac{1}{2}\)z + 4 | |
| 2\(\frac{1}{3}\)z + 1\(\frac{2}{3}\) |