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三.解下列方程.
1. x+1.5-=0
2. -=2-
3. (1-x)-(2-)=2
4. [(x-)-3]-2=x
5. -=2.5
6.4x-3(20-x)=6x-7(9-x) 7.
8. 9.
10.1-2(2x+3)=-3(2x+1) 11. -1= y
12. +y = 13. +x =
14.7x+6=8-3x 15,4x-3(20-x)=6x-7(9-x)
16,-=1- 17,-=
18,
19, 20,- = 1
21,-=1 22,
23, 24,
25, 26,
27,6x-7=4x-5 28,
29, 30,
31, 32, 2x-=-1
33,(3x+7)=2-1.5x 34, -=1
35,80% ·x =(x+22)·75% 36,
37, 38,
39, 40,
41, 42,
43, 44,
45,
46, 47,
48,
(1)3(x-2)=2-5(x-2) (2) 2(x+3)-5(1-x)=3(x-1)
(3) (4)
(5) =+1 (6)
(7) (8)
(9 ) (10)
(11) (12)
(13) (14)
(15) (16)
(17) (x-3)=2-(x-3) (18)
(19) (20)
(21) (22)
(23) (24)(3y+7)=2 - y
(25) (26)3[2(x+1)-8]-2x-7=1
(27) (28)
(29) ; (30) ; (31) ;
(32) ; (33)
(34) ;
(35) ;
(36) ;
(37) ;
(38) ; (39) ;
(40) (41)
(42) ; (43) ;
(44) ; (45) ;
(46) ; (47)
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