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 6a - 2a = -9a + 4z - 9 for a in terms of z.
| \(\frac{2}{5}\)z - \(\frac{1}{2}\) | |
| \(\frac{1}{3}\)z - \(\frac{8}{15}\) | |
| \(\frac{1}{4}\)z + 2\(\frac{1}{4}\) | |
| \(\frac{2}{5}\)z - \(\frac{3}{5}\) |