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