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 + 7z + 6 for a in terms of z.
| -4\(\frac{1}{3}\)z - 1\(\frac{2}{3}\) | |
| -2\(\frac{1}{3}\)z - 1\(\frac{2}{3}\) | |
| 1\(\frac{2}{7}\)z - \(\frac{2}{7}\) | |
| \(\frac{8}{13}\)z + \(\frac{6}{13}\) |