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 + 9a = a - 5z + 2 for a in terms of z.
| 1\(\frac{1}{3}\)z + \(\frac{2}{3}\) | |
| -7z + 1 | |
| -\(\frac{9}{10}\)z + \(\frac{3}{5}\) | |
| 3\(\frac{2}{3}\)z - \(\frac{2}{3}\) |