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 + 3a = -4a - 6z - 9 for a in terms of z.
| 4\(\frac{1}{2}\)z + 4\(\frac{1}{2}\) | |
| -z + \(\frac{1}{2}\) | |
| -\(\frac{3}{5}\)z - \(\frac{3}{5}\) | |
| \(\frac{1}{7}\)z + \(\frac{6}{7}\) |