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