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 7a + 8a = -5a - 7z - 5 for a in terms of z.
| -\(\frac{3}{10}\)z - \(\frac{1}{2}\) | |
| -1\(\frac{1}{4}\)z - \(\frac{5}{12}\) | |
| -\(\frac{9}{14}\)z - \(\frac{5}{14}\) | |
| -\(\frac{1}{2}\)z - 4 |