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 3a - a = -9a + 2z - 9 for a in terms of z.
| -\(\frac{2}{15}\)z + \(\frac{3}{5}\) | |
| \(\frac{3}{4}\)z - 2 | |
| 1\(\frac{1}{9}\)z + \(\frac{5}{9}\) | |
| \(\frac{1}{4}\)z - \(\frac{3}{4}\) |