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