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 2a - 4a = -5a + 6z + 9 for a in terms of z.
| \(\frac{1}{2}\)z - \(\frac{2}{3}\) | |
| -\(\frac{5}{11}\)z - \(\frac{4}{11}\) | |
| \(\frac{4}{5}\)z - 1\(\frac{1}{5}\) | |
| 1\(\frac{3}{7}\)z + 1\(\frac{2}{7}\) |