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初一數学解方程题大集合.doc

发布:2017-03-22约1.43千字共4页下载文档
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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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