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 + 9a = 4a - 6z - 8 for a in terms of z.
| 1\(\frac{7}{8}\)z + 1 | |
| 1\(\frac{1}{13}\)z - \(\frac{9}{13}\) | |
| \(\frac{1}{5}\)z - \(\frac{3}{5}\) | |
| -\(\frac{3}{11}\)z - \(\frac{2}{11}\) |