11.21解一元一次方程专项练习题(200题-有答案)(2)

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1、解一元一次方程专项练习 200 题(附答案) ( 1)x=, ( 2)x = , ( 3) 4x=, ( 4)8 2.5 2x=13 .6 ( 5)0.78 :x=3:5, ( 6)120%x=0.4, ( 8) 1 (x)=6, ( 9)2xx=1.2, ( 10)9 31.7x=13.4, ( 11)x25%x=24 , (12)x +0.2= , (13 )0.6x+90% x=78 , (14) 20% x 2.4 3=0.8, (15)xx=42 , (16) 0.6x+32.5=67.5, (17)1 (x0.45)=5, (18)x2.25=8.25 , (19): x=3 :

2、12, (20) x+0.8=5.6 , ( 21) 1.4 :x=1:0.75 , (22 )x (2)=24 , (23)4x=3, ( 24)12x+70.3=20.1 , ( 25)x+ x= , ( 26)x: 42= , ( 27)0.5+ x= , ( 28)0.8 :=0.48 :x , ( 29) =, ( 30)42:= : ( 31)5x0.4=75% , ( 32)6x0.9=4.5, (33)2( x3)=5.8, (34) 1.6x=6.4 , (35)4x 3 9=29 , (36 ) 16+8x=40 , (37) x1.1=3, (38)+2x= , (39)

3、 37x=1.04 , (40)x1x=2, (41)xx=14 , (42)3xx=, ( 43)= , ( 44)1.2 := , ( 45)= :, ( 46):=x:0.8 , ( 47)x = +1 , ( 48)125% X+25% x=+25%x , = , ( 49) X= , ( 50) ( 51) 5:8=x :32 , ( 52)2x+30.9=24.9, ( 53)5.3x2.9x=, (54) (72.8x)=1.5, (55) x:0.3= :, (56 ) 150% x+66=99 (57)x+60.8x=16 (58 ) (59 ) (60)3 ( X)=1.3

4、 (61) (X+0.5) :2=(X4) :, (62 ) X0.05=3.528 , (63)2X4 6=80 , (64)4 4.53X=6.38 , ( 65)4X7.2=10 , ( 66) 11.5X+X=20 , ( 67)3.8 12+15X=87.6, ( 68) 6X+5=17 , ( 69)0.6 (2.5+X)=4.2, ( 70):=X:, ( 71), ( 72) ( 73), ( 74)4(+x)= , (75)0.25+ x= , (76)x, (77) 200: 6=x:, (78 )4X= , (79)8(x2)=2(x+7) , (80): 18% =,

5、2x=, (81 ) x+ x=46 , (82 ) (83):x= :, (84 )= , ( 85)5(3x4)2(x 1)=5(2x1) ( 86)= , ( 87)8(2X7)=5(X+13) , ( 88)3(x+4.5) =60, ( 89)1.6x+2.4=7.52 , ( 90)3(x0.8)=6.3, ( 91)28.45x=5.8, ( 92)x:= ( 93)+2x= , ( 94)x=15% , ( 95)xx= , ( 96) x+50% x=6 , (97):x=0.3 :12, (98)4x+2(8x)=26 , (99)x=0, (100)+ x=1 , (10

6、1)x (+ )= , (102), (103), (104)x, (105)x , (106) 5x+35=650 , ( 107) 7203x=80, ( 108) 3.6x0.9x=8.1, ( 109) 4 4.5 3x=6, ( 110)= , ( 111) 6 31.8X=7.2, ( 112)x= , ( 113) x =42 , ( 114)x+ = , ( 115) 7x3=8.19, ( 116) 12:0.6=x :, ( 117) 3(x+2)=4(x+1) , (118)3x70% x=9.2, (119) 6+ x=240 , (120)22.50.4x=12.5,

7、 (121)x:3.5=4 :2 , (122)x0.8x6=16 , (123):=x: 8, (124), (125)x:15= :, (126)x+ x= , (127)x50% x=5 , ( 128) 1x=, ( 129) 2.5+1 x=3 , ( 130)3 x 2 =4, ( 131) 8.53x=2, ( 132) 3 x=4, ( 133)x 5% =17.54 , ( 134):=: ( 4x) , (135) 6x+31=49 , (136) 7x 3=8.19, (137)32.89x=17.5, (138) x 0.36x=16 , (139) 6 7+3x=69

8、, (140)6x+2x 56=0, (141)3x0.45 4=2.7, (142)5.8x4.6x=0.96 , (143)8.4 (9x)=3, (144) 3x 1.2=8 , (145) 5x+28=71 , (146)8.71.2x=3.9, (147)8x2.6x=37.8, (148)0.75x0.95 4=8.5, (149) 542+3x=72, ( 150) 8x2.6=37.8, ( 151)x = , ( 152) x+30% x=26 , ( 153) 7.83x=3.6, ( 154)6 31.8x=7.2, ( 155) 10:x=4.5 :0.8 , ( 15

9、6):=x:, ( 157) X7.65 =4.64 , ( 158) 28.25 X=8.25 , ( 159) X( 3.6+2.97)=12.42, ( 160)x= , ( 161)14.5=5.5 , (162)x80% x=48 , (163)75% x 5 =6, (164)x6.8=15.4, (165)1.9x=5.7 , (166)4.3y y=4.6, (167)5x+2.6=7.6 , (168) x 1.5=12.9 , (169) 9x+5x=8.4 , (170) 6.8+3.2x=14.8, (171)5 x= , (172)x= , (173)4.5 3 x=

10、1.5 , ( 174) (1+25 %)x=0.5 , ( 175) x40% x=9, ( 176) x20% =15.2, ( 178)x x= , ( 179)x75% =3, ( 180) 4x, ( 181): x= :4.5 , ( 182) (x4.5) 6=12.5, ( 183) 2717x=13.4, ( 184) 9.6+3x=3.24 5 , ( 185) 2x+5=5x7, (186)3(x2)=25(x2) , (187)4x3( 20 x) +4=0, (188)=1, (189)4x5 6=12 , (190)8x3x=15.6, (191) 30 (x4)

11、=60 , (192)7.2 0.53x=1.2, (193)5x2.4 5=8, (194)+ x= 2 , ( 195) 5x+2.415=66 , (196)3.2x+2.8x- x=1, ( 197) 2.5 16- 8x=12, ( 198) 9.6- 3x=6.3 , ( 199) 5( x+6) =75, ( 200) x0.7+0.9 3=4, 答案: ( 1)x=, = , , x= ; ( 2) x = , x= , x 21= 21 , x=12; ( 3) 4x=, 4x+4x=+4x , = +4x , 4=4x 4, x= ( 4)8 2.5 2x=13 .6 20

12、 2x=13 .6, 13.6+2X=20 , 2X=6.4 , x=3.2 ; (5)0.78 :x=3:5, 3x=0.785, 3x=3.9 , x=1.3 ( 6)120%x=0.4, 120% x+20 %x=0.4+20 %x , 0.4+20% x=1 , 0.4+20% x0.4=10.4, 20% x=0.6 , 20% x=0.6 , x=3; (8)1 (x)=6, 1 ( x) (x)=6 (x) , 1=6 (x) , 6x6 =1, 6x3=1, 6x=4 , 6x 6=46, x= (9)2xx=1.2, x(2)=1.2, x=1.2 , x =1.2 , x=

13、1; (10)9 31.7x=13.4, 27 1.7x=13 .4, 27 1.7x+1.7x=13 .4+1.7x, 13.4+1.7x=27 , 13.4+1.7x13 .4=2713.4, 1.7x=13.6 , 1.7x 1.7=13.6 1.7, x=8 (11)x25 %x=24, 75% x=24, 75% x 75% =24 75% , x=32 ; (12)x +0.2= , x 0.6=, x 0.6+0.6=+0.6 , x= , x = , x=1 ( 13)0.6x+90% x=78 , 1.5x=78 , 1.5x 1.5=78 1.5, x=52 ; (14)2

14、0% x 2.4 3=0.8 , 20% x 7.2=0.8 , 20% x 7.2+7.2=0.8+7.2, 20% x 20% =8 20% , x=40 ; (15)xx=42 , x=42 , x =42 , x=252 (16)0.6x+32.5=67.5, 0.6x+7.5=67.5, 0.6x+7.5 7.5=67.57.5, 0.6x=60 , 0.6x 0.6=60 0.6, x=100 ; ( 17)1 (x0.45)=5, (x0.45) (x0.45)=(x0.45) , x 2.4=1.6 , x 2.4+2.4=1.6+2.4, x=4, x =4 , x= ( 1

15、8)x2.25=8.25, x 2.25+2.25=8.25+2.25, x=10.5 ; ( 19) : x=3: 12, 3x= 12 , 3x 3=93, x=3 (20)x+0.8=5.6 , x+0.80.8=5.60.8, x=4.8 , x =4.8 , x=8 (21) 1.4 :x=1:0.75 , x=1.4 0.75, x=1.05 (22)x (2)=24 , x =24 , x =24 , x=20 ; (23)4x=3, 4x+=3+, 4x=4 , 4x 4=44, x=1 ( 24)12x+70.3=20.1 , 12x+2.1=20.1 , 12x+2.12.

16、1=20 .12.1, 12x 12=18 12, x=1.5 ; (25)x+ x= , x= , x , x= ; (26)x:42= , 10 x=42 , 10 x 10=30 10, x=3 ( 27)0.5+ x= , 0.75+ x=3.75 , 0.75 +x0.75=3.750.75, x=3 , x =3 , x=6; ( 28)0.8 :=0.48 :x , 0.8x= 0.48 , 0.8x=0.2 , 0.8x 0.8=0.2 0.8, x= (29) =, x= , x = , x=3; ( 30)42:= : x=42 , x =30 , x=50 ; ( 31)5x0.4=75% , 5x0.4+0.4=75%+0.4, 5x 5=1.15 5, x=0.23 ( 32)6x0.9=4.5, 6x0.9+0.9=4.5+0.9, 6x=5.4 , 6x 6=5.4 6, x=0.9 ; (33)2( x3)=5.8, 2(

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