一元一次方程50道练习题
(1)2x?1? (3)
1x?4; (2)0.8x?0.1?0.5x?0.7 2153x?17?xx?4?2x?3?x; (4)?; 2236
(5)
x?12x?3x?132123?1??; (6)[(x?1)?2]??x
23232463(7)2[1?
11?x110?3x1111(x?)]?(2x?)(8)(2x?3)?(2x?4)?(2x?5)?(2x?6) 33232345(9)5x+2=7x-8; (10)7?2x?1??3?4x?1??2?3x?2??1?0
(11)
5x?17?; 63 (12)
7?2y?1??1?1?2y??2?2y?1?; 223(13)2x?1x?213?2????; (14)?2x?1??2?x?2 662 (15)1?x1?3x??x2??3?2??2?1?????12;
7x?12(5x?1)?8?2(6x?9(17)323)
(x?1)?30%?(100?x)?25%?2(19)5x;
(21)1?1?16??4???3?1?2x?1????3????5????1
2??3??16)34[43(12x?14)?8]?32x?1 x?2?18x?x?(18)692
2?3x?5?x3?x4?2(20)2 (22)2(2x-1)-4(4x-1)-5(2x+1)-19=0
(
(23)3x?13x?5x?410.4x?0.90.1x?0.50.03?0.02x ?1???2 (24)??3462
(25)3[2(1x?1)?2]?212342?2x3
(27)2(0.3x-4)-5(0.2x+3)=9
(29)3x-2(x?3)?16?x?22?x?236
(31)19{17[15(x?23?4)?6]?8}?1
0.50.20.03(26)2{3[4(5x-1)-8]-20}-7=1
(28)2[(x+3)-2(x+1)]-5=0
(30)x?3?x?40.150.2?1.6
(32)3x=2x+5 (33)2y+3=y-1
(34)7y=4-3y (35)-
21y= (36)10x+7=12x-5-3x 35
(37)8x―4+2x= 4x―3 (38).2(3x+4)=6-5(x-7) (39).x2?2x?43?1?5x?126
(41)
2(2x?1)0.01?2.5?0.2?20x0.2?3.5
(43)
4x?1.50.5?5x?0.80.2?1.2?x0.1?3
(40)x?12[x?12(x?12)]?2 (42)?(x?5)?x?2x?34?x2?3?5 (44). x-1?xx?23=6-1 0.4y?0.9y?50.3?0.2y (45) 0.5-2=0.3
11(46) 3(x+2)-3(2x-3)=2(2x-3)-2(x+2)
1111(47) 3{3[3(3x-2)-2]}-2=0 (48) 5(y+8)―5 = 4(2y―7);
(49)、
233?x2?3x1.8?8x1.3?3x5x?0.4x?(1?)???; (50)、; 32361.220.3
(1)x =2; (2)x =—2; (3)x =7; (4)x =1; (5)x =—5; (6)x =3 (7)x =1; 32171; (8)x =?. (9)x=5; (10)x?; (11)x=3; (12)y?;
7282
(13)x=0; (14)x=6; (15)x?67; (16)x??714.
x??8 17.9x?3x?22530?506x?16 18.5 19357 2025
21. x=8 22.x=-1 23.x=-3 24.x=9 25.x=185 26.x=1 27、x=-80
28、x=-
32 29、
529 30、24.96 31、x=1
32)x=5 33)y=-4 34)y=
25 35)y=-516 36)x=-12 37)x=6 38.x=3 39.x=-72 40.x=176 41.x?25 42、x=6 ; 43、x=-2
44.x??27 45. y?9 46.x?12 47. x=186
48、 y = 21 49、x=112; 50、x=10;
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七年级上:一元一次方程50道练习题(含答案)
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