题目

当x为何值时，代数式等于代数式的值？ 答案：解:依题意，得. 去分母，4(3x-2)-3(9-2x)=6(x-1),12x-8-27+6x=6x-6,12x=29,所以x=. Great changes ______ in my hometown since 1979. [　　] A. took place　　 　　  B. have been taken place C. have taken place　　 D. were taken place