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 c - 7c = 7c + 6z + 9 for c in terms of z.
| \(\frac{1}{16}\)z - \(\frac{9}{16}\) | |
| -z - 8 | |
| -2\(\frac{1}{6}\)z - 1\(\frac{1}{2}\) | |
| -\(\frac{4}{5}\)z + 1\(\frac{2}{5}\) |