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 9c + c = 8c - 6z - 7 for c in terms of z.
| -3z + 6 | |
| -7z - 7 | |
| -1\(\frac{2}{15}\)z - \(\frac{1}{5}\) | |
| -\(\frac{2}{7}\)z - 1\(\frac{2}{7}\) |