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stiind ca a+b=48, b+c=41 si 4a+3b+2c=223, Aflati a,b,c Dau coroana

Răspuns :

Iakabcristina2
a+b=48 =>b=48-a
b+c=41 =>c=41-b sau c=41-48+a sau c=a-7

4a+3(48-a)+a-7=223
4a+144-3a+a-7=223
2a=223-137
2a=86 =>a=43
b=48-43 =>b=5
c=41-5 =>c=36

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