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2kg crap+3kg stiuca=280lei ,3kg crap+2kg stiuca=245lei cat costa kg crab si cat costa kg stiuca?

Răspuns :

Renatemambouko
a=pret  kg crap
b=pret kg stiuca
2a+3b=280lei    b=(280-2a)/3
3a+2b=245lei
3a+2(280-2a)/3=245
9a+560-4a=735
5a=175
a=35 lei/kg crap
b=(280-2×35)/3=(280-70)/3=210/3=70 lei/kg stiuca

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