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 4a - 2a = 9a - 9z - 6 for a in terms of z.
| -2z + 6 | |
| \(\frac{1}{5}\)z - 1 | |
| -\(\frac{11}{16}\)z + \(\frac{3}{8}\) | |
| 1\(\frac{2}{5}\)z + 1\(\frac{1}{5}\) |