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 7a + a = -2a - 5z + 8 for a in terms of z.
| -\(\frac{2}{3}\)z + \(\frac{8}{9}\) | |
| -\(\frac{1}{8}\)z - \(\frac{3}{16}\) | |
| \(\frac{2}{13}\)z + \(\frac{2}{13}\) | |
| \(\frac{3}{7}\)z + \(\frac{3}{14}\) |