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 - 7a = 6a + 9z - 9 for a in terms of z.
| -1\(\frac{1}{3}\)z + \(\frac{3}{4}\) | |
| z + 2\(\frac{2}{3}\) | |
| -\(\frac{1}{12}\)z + \(\frac{1}{4}\) | |
| -1\(\frac{2}{3}\)z - 2 |