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 -7a + 9a = 8a - 8x + 7 for a in terms of x.
| 1\(\frac{2}{15}\)x - \(\frac{7}{15}\) | |
| -\(\frac{10}{17}\)x - \(\frac{2}{17}\) | |
| -5\(\frac{1}{2}\)x + 3\(\frac{1}{2}\) | |
| -\(\frac{7}{12}\)x + \(\frac{5}{12}\) |