（1）x+4/5-（x-5）=x+3/3-x-2/2
(x+4)/5-(x-5)=(x+3)/3-(x-2)/2是不是这样的?
6(x+4)-30(x-5)=10(x+3)-15(x-2)
6x+24-30x+150=10x+30-15x+30
6x-30x-10x+15x=30+30-24-150
-19X=-114
X=6
(2)(7x-5)/0.4=3x/1.6
10(7X-5)/4=30X/16
40(7X-5)=30X
280X-200=30X
280X-30X=200
250X=200
X=4/5