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 9a + 5a = 8a - 7z - 5 for a in terms of z.
| -12z - 5 | |
| \(\frac{8}{15}\)z + \(\frac{2}{15}\) | |
| -\(\frac{15}{17}\)z + \(\frac{9}{17}\) | |
| \(\frac{7}{12}\)z + \(\frac{1}{3}\) |