Which of the numbers 6, 7, and 8 is a solution of 3 x ≤ 18?

1 answer

We can solve for x by dividing both sides of the inequality by 3:
$$\frac{3x}{3} \le \frac{18}{3}$$
Simplifying,
$$x \le 6$$
Therefore, the only number that is a solution to the inequality is 6.