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