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