单选题
Which of the following is equivalent to the inequality 3x-6＞6x+9?
(A) x＞-5
(B) x＜-5
(C) x＞-2
(D) x＜3
(E) x＞3
【正确答案】
B
【答案解析】Treat an inequality like an equation, and isolate x on the left side, as follows: 3x-6＞6x+9 3x-6x-6＞9 -3x＞9+6 -3x＞15 Remember to reverse the inequality when dividing by a negative number: x＜-5