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