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 -9a - 3a = -4a + 6z + 5 for a in terms of z.
| 2z - 7 | |
| \(\frac{1}{3}\)z + \(\frac{5}{6}\) | |
| 1\(\frac{2}{13}\)z + \(\frac{5}{13}\) | |
| -1\(\frac{4}{5}\)z - 1 |