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