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 -2c + 6c = 7c - 7z - 9 for c in terms of z.
| \(\frac{1}{3}\)z - 1\(\frac{1}{6}\) | |
| -1\(\frac{7}{8}\)z - \(\frac{1}{8}\) | |
| 1\(\frac{4}{9}\)z + 1 | |
| -2\(\frac{2}{7}\)z - \(\frac{5}{7}\) |