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