Which set of notation correctly expresses the solution set of the equation 31-9x=4

Answer 1

To solve the equation $31-9x=4$, we need to isolate $x$.

1. Start by subtracting 31 from both sides: $$-9x=4-31$$ $$-9x=-27$$

2. Next, divide both sides by -9: $$x=\frac{-27}{-9}$$ $$x=3$$

The solution set contains the single solution $x=3$. In set notation, this can be expressed as:

$$3$$

Thus, the correct notation to express the solution set of the equation $31-9x=4$ is $3$.