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