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 -6a + 3a = 6a + 7z - 7 for a in terms of z.
| -\(\frac{1}{3}\)z + \(\frac{7}{12}\) | |
| -\(\frac{2}{7}\)z + \(\frac{3}{7}\) | |
| -6\(\frac{1}{2}\)z + 2\(\frac{1}{2}\) | |
| -\(\frac{2}{5}\)z - 1\(\frac{2}{5}\) |