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Georgebobotat
a fost răspuns

2a+2b+2c=200
a+b=60 si b+c=75
a,b,c?

Răspuns :

Adeluta2016
200:2=100(a+b+c) A+b=60 C=100-60=40 B+c=75 B+40=75 B=75-45=30 100-30-40=70-40=30a
Icecon2005
2a+2b+2c=200⇒dupa simplificarea cu 2⇒a+b+c=100

a+b+c=100
a+b     = 60
⇒60+c=100⇒c=100-60
⇒c=40

⇒a+75=100
⇒a=100 - 75
⇒a=25

a+b=60
b=60-a
b=60-25
⇒b=35

a=25,  b=35,  c=40