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 + 5a = 6a + 2x - 9 for a in terms of x.
| -2\(\frac{3}{5}\)x + 1\(\frac{4}{5}\) | |
| 1\(\frac{1}{2}\)x + 4\(\frac{1}{2}\) | |
| -1\(\frac{7}{10}\)x + \(\frac{1}{10}\) | |
| \(\frac{2}{3}\)x - \(\frac{7}{15}\) |