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 -8c + 9c = 2c - 7z - 9 for c in terms of z.
| -\(\frac{2}{7}\)z - \(\frac{4}{7}\) | |
| \(\frac{5}{16}\)z + \(\frac{1}{16}\) | |
| 1\(\frac{3}{5}\)z + \(\frac{9}{10}\) | |
| -\(\frac{5}{8}\)z - \(\frac{1}{16}\) |