52(53)(?1)?(?5)???(?3)?2?(?5)?? (54)
142
(55)-1-×[2―(―3)]
6
56.(x-1)-2(1-x)=3+2x 56. 59.
62.计算:﹣1
63.先化简,再求值:2(x2﹣xy)﹣(3x2﹣6xy),其中x=,y=﹣1.
(64)4(x﹣1)﹣3(2x+1)=7; (65)
﹣1=
.
2014
2
2
12x?34x?1??1 58.(3x -6)=x-3
65252x?12x?110x?131x?22x?3??1 += 60.[x―(x―1)]=2 (x―1) 61.
4362246﹣(1﹣)÷[﹣3÷(﹣2)].