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 -2a - a = -5a - 2z + 4 for a in terms of z.
| -\(\frac{1}{3}\)z + 1\(\frac{1}{3}\) | |
| 2\(\frac{1}{2}\)z + 1\(\frac{1}{4}\) | |
| -\(\frac{1}{15}\)z + \(\frac{7}{15}\) | |
| \(\frac{1}{6}\)z - \(\frac{1}{4}\) |