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 3a + 7a = -4a - z - 8 for a in terms of z.
| -2\(\frac{1}{7}\)z + \(\frac{6}{7}\) | |
| 2\(\frac{1}{6}\)z + 1\(\frac{1}{2}\) | |
| \(\frac{2}{5}\)z + \(\frac{9}{10}\) | |
| -1\(\frac{1}{7}\)z - 1\(\frac{1}{7}\) |