设乙筐有x千克,则甲筐有(x+20)千克,
(x+20-10)×
-(x-10)×3 10
=5,1 3
x+3-3 10
x+1 3
=5,10 3
x-3 10
x+1 3
=5,19 3
x-1 3
x=3 10
-5,19 3
x=1 30
,4 3
x=40;
40+20=60(千克);
答:甲筐有香蕉60千克,乙筐有香蕉40千克.