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 - 9a = -9a + 5z + 7 for a in terms of z.
| \(\frac{1}{15}\)z + \(\frac{1}{15}\) | |
| \(\frac{6}{17}\)z + \(\frac{9}{17}\) | |
| \(\frac{14}{15}\)z + \(\frac{7}{15}\) | |
| -\(\frac{13}{14}\)z + \(\frac{4}{7}\) |