Răspuns:
(100-80)+(50-30)+(40-10)+(30-20)=20+20+30+10=80 produse nevandute
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80·15+30·25+10·120+20·170=1200+750+1200+3400=6550 lei incasati pe marfa vanduta
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a=100
b=50
a(2x+1)+b(3x-1)=400
100(2x+1)+50(3x-1)=400
200x+100+150x-50=400
350x=400-50
x=350:350
x=1
