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