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?x; x?4?2x?3?x; (4)?2236
(5)
x?12x?3x?132123; (6)[(x?1)?2]??x ?1??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)
3?22x?1x?21????; (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????3?1?2x?1????3????5???1 ?4?
2?3?(16)34[43(12x?14)?8]?32x?1 x?2?18x?x? (18)692
2?3x?5?x?x?2 (20)234
(22)2(2x-1)-4(4x-1)-5(2x+1)-19=0
3x?13x?5x?410.4x?0.90.1x?0.50.03?0.02x(23)3?1?4?6?22 (24)0.5?0.2?0.03
(25)32[23(14x?1)?2]?212?2x3
(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-2(x?3)?16?x?2?x?2? 3(?0)x?3?x?43260.150.2?1.6
(31)19{17[15(x?23?4)?6]?8}?1 (32)3x=2x+5 2y+3=y-1
(33)