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 - 5a = -9a + 3z + 8 for a in terms of z.
| 1\(\frac{3}{5}\)z + 1\(\frac{3}{5}\) | |
| \(\frac{3}{4}\)z - 1\(\frac{1}{2}\) | |
| z + \(\frac{8}{13}\) | |
| -\(\frac{4}{7}\)z - \(\frac{4}{7}\) |