初一數学解方程题大集合.doc
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三.解下列方程.
x+1.5-=0
-=2-
(1-x)-(2-)=2
[(x-)-3]-2=x
-=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=x-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)
(2) ; (3) ; () ;
() ; ()
() ;
() ;
(3) ;
() ;
() ; () ;
() (4)
() ; () ;
() ; () ;
() ; (4)
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