创作编号:
GB8878185555334563BT9125XW
创作者: 凤呜大王*
解一元一次方程的练习题
解下列方程:(每题4分)
(1)3(x-2)=2-5(x-2) (2) 2(x+3)-5(1-x)=3(x -1)
(3) 3(1)2(2)23x x x +-+=+ (4)
3(2)1(21)x x x -+=--
(5) 2x -13 =x+22 +1 (6) 12
1
31=--x (7) x x -=+3
8
(8) 12542.13-=-x x
(9 ) 310.40.342x x -=+ (10) 3142
125
x x -+=-
(11) 3125724
3
y y +-=- (12) 57
6132
x x -=-+
(13)
143321=---m
m (14) 5
2
221+-
=--y y y (15)12136x x x -+-=- (16) 38
123
x x ---= (17) 12(x-3)=2-12(x-3) (18)35
.012.02=+--x x
创作编号:
GB8878185555334563BT9125XW
创作者: 凤呜大王*
(19) 301.032.01=+-+x x (20) 223
146
x x +--= (21)
124362
x x x
-+--=
(22) x x 23231423 =??
?
???-??? ??- (23)
112
[(1)](1)223
x x x --=- (24)27(3y+7)=2 - 32y
(25)设k 为整数,方程kx=4-x 的解x 为自然数,求k 的值。
7324x x -= 23255x += 70%20% 3.6x x +=
312054x ?=? 425%105x += 15%68x x -=
X +8
3X =121 5X -3×
21
5
=75
3
2X ÷4
1=12
6X +5 =13.4 83
4143=+X 3X=8
3 X ÷7
2=
16
7
X +87
X=4
3 4X -6×3
2=2
125 ÷X=3
10 53 X =
72
25
98 X =
6
1×51
16
X ÷ 356=45
26
×2513
4x -3 ×9 = 29 21
x + 6
1x = 4
103
X -21×32=4 204
1=+x x
8)6.2(2=-x
创作编号:
GB8878185555334563BT9125XW
创作者: 凤呜大王*
6X +5 =13.4 25 X-13 X=3
10 4χ-6=38
5X=19
15
218
X=15
4 X ÷54=2815
32
X ÷4
1=12 5
3X=72
25 9
8X=6
1×51
16
X ÷356=45
26
÷2513
X-0.25=41
4
X
=30%
4+0.7X=102 32
X+21X =42 X+4
1X=105
X-8
3X=400 X-0.125X=8
X
36
=
4
3
X+37 X=18 X ×( 16 + 38 )=13
12 x -0.375x=6
5
x ×3
2+2
1=4×8
3 X -7
3X =12 5 X -2.4×
5=8
0.36×5- 34 x = 35 23 (x- 4.5) = 7 1
2 x- 25%x =
10
x- 0.8x = 16+6 20 x – 8.5= 1.5 x- 4
5 x -4=
21
X +25%X=90 X -37 X= 8
9
一、解方程:+-×÷=
(1) 3.5X +1.8=12.3 (5) X +
52X =21 (6) 5
4
X +52X =2
1
(7) 3.6X ÷2=2.16 (8) X +72X =4
3
(2) 0.8X -4=1.6
(3) 5X ÷2=10 (4) X -0.25X =3 (9) X -5
2
X =10
3
(10) X -
52=103 (11) 2X +7X =109 (12) 8
3+X =5
2
(13) 10
7X =
2514 (14) 21X =43 (15) 9
5
X =10
(16) 180+6X =330 (17) 2.2X -1=10 (18) X -0.8X =10
(19) 15X÷2=60 (20) 4X+X=3.15 (21)3.4X+1.8=8.6
(22) 5X-X=2.4 (23) 1.5X-X=1 (24) 6.6X-6X =1.8
创作编号:
GB8878185555334563BT9125XW
创作者:凤呜大王*
练习二
1、12-3(9-x)=5(x-4)-7(7-x);
2、6x-17=13
3、
9-10x=10-9x
4、2(x-1)=4.
5、13x-26=13
6、75-5x=70
7、2(6x-2)=8 8、25x(12-6)=300 9、
24x+12=132
10、56=12x+8 11、2x+4=30 12、12x=11x -79
13、13x-12(x+2)=0 14、67-12x=7 15、(x-1)-(3x+2)= - (x-1)
16、18x-16x+18×1+50=70 17、14×(60-x)×2=20x 18、
4x+9(x+2)=200
19、100(x+1)+10x+(3x-2)+100(3x-2)+10x+(x+1)=1171
20、5x+4.5(103-x)=486
练习三
(1)2x+8=16 (2)x/5=10 (3)x+7x=8 (4)9x-3x=6 (5)6x-8=4 (6)5x+x=9 (7)x-8=6x (8)4/5x=20 (9)2x-6=12 (10)7x+7=14 (11)6x-6=0 (12)5x+6=11 (13)2x-8=10 (14)1/2x-8=4 (15)x-5/6=7 (16)3x+7=28 (17)3x-7=26 (18)9x-x=16 (19)24x+x=50 (20)6/7x-8=4 (30)3x-8=30
(31)6x+6=12 (32)3x-3=1 (33)5x-3x=4
(34)2x+16=19 (35)5x+8=19 (36)14-6x=8 (37)15+6x=27 (38)5-8x=4 (39)7x+8=15 (40)9-2x=1 (41)4+5x=9 (42)10-x=8
(43)8x+9=17 (44)9+6x=14
(45)x+9x=4+7
(46)2x+9=17 (47)8-4x=6 (48)6x-7=12
创作编号:
GB8878185555334563BT9125XW
创作者:凤呜大王*
(49)7x-9=8 (50)x-56=1 (51)8-7x=1
(52)x-30=12 (53)6x-21=21 (54)6x-3=6 (55)9x=18 (56)4x-18=13 (57)5x+9=11 (58)6-2x=11 (59)x+4+8=23 (60)7x-12=8
(61)X-5.7=2.15 (62)15.5X-2X=18 (62)3X
0.7=5
(63)3.5×2= 4.2 x (64)26×1.5= 2x
(65)0.5×16―16×0.2=4x
(66)9.25-X=0.403 (67)16.9÷X=0. 3
(68)X÷0.5=2.6
(69)x+13=33 (70)3 - 5x=80 (71)1.8- 6x =54
(72)6.7x -60.3=6.7 (73)9 +4x =40 (74)0.2x-0.4+0.5=3.7
(75)9.4x-0.4x=16.2 (76)12 -4x=20 (77)1/3 x+5/6 x=1.4
(78)12 x+34 x=1 (79)18x-14 x= 12 (80)23 x-
5×14 = 14
(81)12 +34 x=56 (82)22-14 x= 12 (83)23 x-14 x= 14
(84)x+14 x= 65 (85)23 x=14 x +14 (86)30 x-12 x -14 x=1
创作编号:
GB8878185555334563BT9125XW
创作者:凤呜大王*