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 2a + 8a = 5a - 6x + 9 for a in terms of x.
| -2\(\frac{1}{2}\)x + 4 | |
| -\(\frac{1}{4}\)x + 1\(\frac{1}{2}\) | |
| -\(\frac{11}{12}\)x - \(\frac{2}{3}\) | |
| 4\(\frac{2}{3}\)x - 3 |