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