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 + 5a = 9a + 6z - 9 for a in terms of z.
| 2z - 1 | |
| \(\frac{3}{10}\)z + \(\frac{3}{10}\) | |
| -\(\frac{1}{8}\)z + 1\(\frac{1}{8}\) | |
| z + 6 |