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