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 9a - a = -7a + 2z + 1 for a in terms of z.
| \(\frac{1}{2}\)z - 4 | |
| -7z - 4 | |
| -\(\frac{1}{2}\)z + \(\frac{1}{3}\) | |
| \(\frac{3}{16}\)z + \(\frac{1}{16}\) |