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 -3a - 9a = -4a - 6z - 8 for a in terms of z.
| \(\frac{1}{4}\)z - 1\(\frac{3}{4}\) | |
| 3z - 8 | |
| z - \(\frac{1}{2}\) | |
| -3z + 2\(\frac{2}{3}\) |