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 3c + 9c = 8c + 7z + 5 for c in terms of z.
| 1\(\frac{3}{4}\)z - 2\(\frac{1}{4}\) | |
| -\(\frac{1}{13}\)z - \(\frac{7}{13}\) | |
| 1\(\frac{7}{10}\)z + \(\frac{3}{10}\) | |
| \(\frac{2}{5}\)z - 1 |