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 3a + 10a = 7a - 9x + 5 for a in terms of x.
| 2\(\frac{1}{2}\)x - \(\frac{1}{2}\) | |
| -\(\frac{7}{12}\)x + \(\frac{7}{12}\) | |
| 4\(\frac{3}{4}\)x - 1\(\frac{1}{4}\) | |
| x - \(\frac{2}{3}\) |