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