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 8a - a = -7a + 3z - 9 for a in terms of z.
| -\(\frac{1}{4}\)z - \(\frac{7}{16}\) | |
| z + 1\(\frac{1}{8}\) | |
| \(\frac{4}{15}\)z - \(\frac{3}{5}\) | |
| \(\frac{1}{13}\)z + \(\frac{1}{13}\) |