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