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 a + 4a = -2a - z - 9 for a in terms of z.
| -3z - 8 | |
| -1\(\frac{2}{3}\)z - 3 | |
| 2z - 4 | |
| \(\frac{8}{13}\)z - \(\frac{7}{13}\) |