解方程(1)3x-2=-5 (2)-5x+2=3x-4 (3)2x-3(10-x)=5 (4)3(x-1)=3-(2x+1) (5)1-3(x+1/3)=1/3
解方程(1)3x-2=-5 (2)-5x+2=3x-4 (3)2x-3(10-x)=5 (4)3(x-1)=3-(2x+1) (5)1-3(x+1/3)=1/3
日期:2017-09-27 12:04:44 人气:2
(1)3x-2=-5
解:两边加上2得
3x=-5+2
3x=-3
x=-1
(2)-5x+2=3x-4
解:移项片
-5x-3x=-4-2
-8x=-6
x=3/4
(3)2x-3(10-x)=5
2x-30+3X=5
2X+3X=5+30
5X=35
X=7
(4)3(x-1)=3-(2x+1)
3X-3=3-3X-1
3X+3X=3-1+3
6x=5
x=5/6
(5)1-3(x+1/3)=1/3