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