设乙为x,则甲为x+60 ,丙为3x+800.
(x+3x+x)+(60+800)=7860
5X+860-860=7860-860
5X5=70005
X=1400
甲:1400+60=1460
丙:1400×3+800
=4200+800
=5000
设乙为x,则甲为x+60 ,丙为3x+800.
(x+3x+x)+(60+800)=7860
5X+860-860=7860-860
5X5=70005
X=1400
甲:1400+60=1460
丙:1400×3+800
=4200+800
=5000