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 + 4a = -7a + 8z + 2 for a in terms of z.
| -2\(\frac{2}{3}\)z + 2\(\frac{1}{3}\) | |
| -1\(\frac{2}{13}\)z - \(\frac{8}{13}\) | |
| \(\frac{4}{5}\)z + \(\frac{2}{5}\) | |
| 1\(\frac{1}{5}\)z + \(\frac{9}{10}\) |