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Dorry7710
a fost răspuns

a+b+c=47 a=? b=2×a+4 c=2×b aflati a, b, c. Multumesc

Răspuns :

Mpaul2000
a+b+c=47
a+2*a+4+2*b=47
3*a+4+4*a+8=47
7*a=47-12
7*a=35
a=5
b=2*5+4=14
c=2*14=28
a+2a+4+4a+8=47
7a+12=47
7a= 47-12
7a= 35
a=35:7
a= 5
b= 10+4=14
c= 28
verificare: 5+14+28= 19+28=47

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