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 4a - 9a = 9a + 6z - 8 for a in terms of z.
| -3z + 1\(\frac{3}{5}\) | |
| 12z - 1 | |
| -5z - 4\(\frac{1}{2}\) | |
| z - \(\frac{2}{7}\) |