一元一次方程50道练习题
(1)
(3)
(5)
(7)
(9)5x+2=7x-8; (10)
(11)
(13)
(15)
(17)
(19)
(21)
(23)
(25)
(27)2-5+3)=9 (28)2[(x+3)-2(x+1)]-5=0
(29)3x-
(31)
(34)7y=4-3y (35)-
(37)8x―4+2x= 4x―3 (38).2(3x+4)=6-5(x-7)
(39).
(41)
(43)
(45)
(46) 3(x+2)-
(47)
(49)、
(1)x =2; (2)x =—2; (3)x =7; (4)x =1; (5)x =—5; (6)x =
(7)x =
(13)x=0; (14)x=6; (15)
17.
21. x=8 =-1 =-3 =9 =
=1 27、x=-80 28、x=-
32)x=5 33)y=-4 34)y=
=3 =-
44.
48、 y = 21 49、x=
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