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 + 7a = -2a + z - 8 for a in terms of z.
| -2\(\frac{1}{3}\)z - \(\frac{1}{2}\) | |
| -z + 1\(\frac{3}{5}\) | |
| -2z - 2\(\frac{2}{3}\) | |
| \(\frac{2}{13}\)z + \(\frac{4}{13}\) |