一元一次方程50道练习题(含答案)
1x?4; 2(2)0.8x?0.1?0.5x?0.7;
15(3)x?4?2x?3?x;
223x?17?x?(4); 36(1)2x?1?(5)
x?12x?3x?1?1??; 46332123?x;
2323211?x110?3x)]?(2x?) (7)2[1?(x?33231111(8)(2x?3)?(2x?4)?(2x?5)?(2x?6).
2345(6)[(x?1)?2]?(9)5x+2=7x-8;
(10)7?2x?1??3?4x?1??2?3x?2??1?0;
5x?17?; 63712(12)?2y?1???1?2y???2y?1?;
2232x?1x?21???; (13)662(11)(14)
3?2???2x?1?2?x?2; ??2?3?(15)
1?x1?3x??x???1???; 2?32?2??12?341432143x?1; 2(16)[(x?)?8]?5127x?12(x?)?8?(6x?9)323(17);
x?(18)
2?18xx??269;
2x5;
(x?1)?30%?(100?x)?25%?(19)
2?3x5?xx???2234(20).
(21)
1?1?1?1???x?1???3??5??1 ??6?4?3?2???
(22)2(2x-1)-4(4x-1)-5(2x+1)-19=0 (23)
3x?13x?5x?41?1???2 34620.4x?0.90.1x?0.50.03?0.02x(24) ??0.50.20.0332112x(25)[(x?1)?2]?2?
23423(26)2{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
2(x?3)x?2x?2 ?16??326x?3x?4(30)??1.6
0.150.2111x?2(31){[(?4)?6]?8}?1
9753(29)3x-
(32)3x=2x+5 (33)2y+3=y-1
(34)7y=4-3y (35)-
21y= 35(36)10x+7=12x-5-3x
(37)8x―4+2x= 4x―3
(38).2(3x+4)=6-5(x-7) (39).
x2x?45x?12??1? 236111 (40)x?[x?(x?)]?2
2222(2x?1)0.2?20x?2.5??3.5 (41)
0.010.2x?2x?34?x?? 235(42)?(x?5)?(43)
4x?1.55x?0.81.2?x???3 0.50.20.11?xx?2(44). x-3=6-1
0.4y?0.9y?50.3?0.2y(45). 0.5-2=0.3
(46) 3(x+2)-113(2x-3)=2(2x-3)-2(x+2)
(47). 11113{3[3(3x-2)-2]}-2=0
(48)、5(y+8)―5 = 4(2y―7);
(49)、
23x?32(1?3?x3)?2?3x6; (50)、1.8?8x1.2?1.3?3x2?5x?0.40.3;
(1)x =2;(2)x =—2;(3)x =7;(4)x =1;
(5)x =—5;(6)x =31213;(7)x =7;(8)x =?2. (9)x=5;(10)x?718;(11)x=3;(12)y?2;
(13)x=0;(14)x=6;(15)x?617;(16)x??74.
x??89x?3x?22530?506x?16 17.
18.5 19357 202521. 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=
255 35)y=-6 36)x=-12 38.x=3 39.x=-71722 40.x=6 41.x?5
(42)x=6 ; (43)x=-2 ;
37)x=16
2 45. y?9 46.x?12 47. x=186 71148、 y = 21 49、x=; 50、x=;
21044.x??
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