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七年级上:一元一次方程50道练习题(含答案)
一元一次方程50道练习题
(1); (2)
(3); (4);
(5); (6)
(7)(8)
(9)5x+2=7x-8; (10)
(11); (12);
(13); (14)
(15); (16)
(17) (18)
(19); (20)
(21) (22)2(2x-1)-4(4x-1)-5(2x+1)-19=0
(23) (24)
(25) (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
(29)3x- (30)
(31) (32)3x=2x+5 (33)2y+3=y-1
(34)7y=4-3y (35)-= (36)10x+7=12x-5-3x
(37)8x―4+2x= 4x―3 (38).2(3x+4)=6-5(x-7)
(39). (40)
(41) (42)
(43) (44). x-=-1
(45) -=
(46) 3(x+2)-(2x-3)=2(2x-3)-(x+2)
(47) {[(x-2)-2]}-2=0 (48) 5(y+8)―5 = 4(2y―7);
(49)、; (50)、;
(1)x =2; (2)x =—2; (3)x =7; (4)x =1; (5)x =—5; (6)x =;
(7)x =; (8)x =. (9)x=5; (10); (11)x=3; (12);
(13)x=0; (14)x=6; (15); (16).
17. 18. 19 20
21. x=8 22.x=-1 23.x=-3 24.x=9 25.x=
26.x=1 27、x=-80 28、x=- 29、 30、24.96 31、x=1
32)x=5 33)y=-4 34)y= 35)y=- 36)x=-12 37)x=
38.x=3 39.x=- 40.x= 41. 42、=6 ; 43、=-2 ;
44. 45. 46. 47. x=186
48、 y = 21 49、x=; 50、x=;
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