精选 一元一次方程50道练习题(含答案)

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精选一元一次方程50道练习题

12x1

1

2

x4 20.8x0.10.5x0.7

312x42x35

2x

43x173x

6

5

x1412x36x1

3

632[23(12x1)2]233

2

x

72[111x3(x

3)]12(2x103x

3) 812(2x3)13(2x4)14(2x5)1

5(2x6)95x+2=7x-8

1072x134x123x210

11

5x167

3 12722y11212y2

32y1

132x16x261

2

1432232x12



x2

151x13x23221x

12



1634[43(12x14)8]3

2x1

177x12(53x12)82

3(6x9)



x

218x18

6x92

2

19

(x1)30%(100x)25%

5x23x5x2023x

42

(21)1611312x1

351

4222(2x-1)-4(4x-1)-5(2x+1)-19=0

23

3x13x5314x4621

2

240.4x0.90.1x0.50.030.02x

0.50.2

0.03 253212[3(4x1)2]2122x

3



262{3[4(5x-1)-8]-20}-7=1 (27)2(0.3x-4)-5(0.2x+3)=9 (28)2[(x+3)-2(x+1)]-5=0

(29)3x-2(x3)x3162x2

2

6

(30)x3x40.150.2

1.6








(31)19{17[15(

x2

3

4)6]8}1

(32)3x=2x+5

(33)2y+3=y1

(34)7y=43y

(35)21

5

y=3

(36)10x+7=12x53x (37)8x4+2x= 4x3

(38)23x+4=6-5x-7

(39)x2x45231x12

6

(40)x12[x11

2(x2)]2

(41)

2(2x1)0.0.012.5220x

0.23.5 42(x5)

x2x234x

35

43

4x1.55x0.81.20.50.2x

0.1

3 (44). x-1x3=x2

6

-1 (45). 0.4y0.9y50.30.2y

0.5-2=0.3



(46) 3x+2-13(2x-3)=2(2x-3)-1

2

(x+2)

(47). 13{13[13(1

3

x-2)-2]}-2=0

(48)5(y8)5 4(2y7) (49)

23x33x23x

2(13)6

(50)

1.88x1.21.33x25x0.4

0.3





答案:1x =22x =23x =74x =1

5x =56x =3137x =278x =1

2

9x=510x7811x=312y1

2



13x=014x=615x61

716x74

8 17.

x

9 18.x35 19x22530355067 20x

16

25

21. x=8 22.x=-1 23.x=-3 24.x=9 25.x=18

5

26.x=1 27x=-80 28x=-3

2



29

52

9

3024.96 31x=1 32)x=5 33)y=4 34)y=

25 35)y=5

6

36)x=12 37)x=16



38.x=3 39.x=-72 40.x=176

41.x2

5

42x=6 43x=-2

44x27

45. y9 46.x12 47. x=186

48 y 21 49x11

2 50x10




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