1、(1)4x-20=4 (2)3.2x-42=26.8(3) 5x+6=18 (4)40x+5x=124(5)5(2.2+x)=10.8 (6)2(x+1.8)=3.6(7)(x-8):2=8.8 (8)7(x-5)=49.7(9)13.8x+11.2x=50.5 (10)6x+29=137(11)4x=x+99 (12)9x+10=91(13)x+7.1=7.2 (14)4x-x=89.8(15)99-10x=70 (16)9.5x-5x=28(17)11.8+2x=65 (18) X-7.7=9.15(19) 9.9x-99=9.9 (20)58X-55X=81(21)49+4x=53 (2
2、2)5X+2.9=9.3(23)5x+15=39.6 (24)7.5=6.9+x(25)59x-39x=240 (26)4X+3.5=2x+99(27)1.2x-5=37 (28) 2x-55=89(29)3x-100=35 (30) 7x+14=49(31)6x+36=54 (32)36x-72=0(33)55x-55=55 (34) 5x+76=19(35)45x-35x=100 (36) 3x-89=100(37)5x+39=109 (38) 5x-49=7.3(39) 8+2x=98 (40)6x-3X-21=21(41)56-5-x=8 (42)6x-5=41(43)5x+79=17
3、.5 (44)9x=98-8(45)81+3x=99 (46)5x-55=17(47)5x+9x=28 (48)5x+88=98(49)2x+54=93 (50)75-2x=53(51)56-5x=99 (52)x+16+8=48(53)3X-5.9=15.1 (54)92-59-4x=20(55)7.5X+15=8x (56)8x:3=1.4(57)26X+1.5=2x (58)16x+5x=210(59)0.5X+54=4x (60)56x-51x=85(61) 9.2-X=0.4 (62)3x+42:14=15(63)12.6:X=0.3 (64)24+4x=56(65)X-0.8=15
4、.7 (66)101-5x=80(67)120-5x=58 (68)5x+5=30(69)7(x-6)=49 (70)x-42.9=45.4(71)48+2x=76 (72)x:1.8=90(73)(x-6)-56=19 (74)3x-56=1(75)x:10+9=21 (76)3x+81=36(77)(300-x):10=30 (78)5.3+7x=7.4(79)81.3-x=2.6 (80)3x:5=4.5(81)68-3x=2 (82)5X-0.8X=42(83)5.6x=33.6 (84)0.1(x+6)=3.3X0.4(85) 17.8-x=9.8 (86)(25.5-5.5):x=2(86) 75.6:x=12.6 (88)9x-49=59(89) 5x+12.5=32.3 (90) 2(x+9)=132(90) 98-89+5x=51 (92) x+9x+20=90(93) 9.5+x+5.9=64 (94)6(x+45)=50(95)5x+5.6=1.5 (96)10x=88-21(97)85+3x=91 (98)2x-86=36(99)2x+10x=48 (100)2x+16=38
