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