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 = -4a + 4z + 5 for a in terms of z.
| -1\(\frac{2}{3}\)z + 3 | |
| 1\(\frac{3}{8}\)z + \(\frac{1}{4}\) | |
| -2\(\frac{3}{4}\)z + 2 | |
| \(\frac{5}{13}\)z + \(\frac{5}{13}\) |