Răspuns :
a+b=700
a+b= 600+100
b+c=500
b+c= 400+100
a+c=800
a+c= 600+200
acum aflam a b si c
a =600
b= 400
c=100
sper sa fie de folo
a+b= 600+100
b+c=500
b+c= 400+100
a+c=800
a+c= 600+200
acum aflam a b si c
a =600
b= 400
c=100
sper sa fie de folo
a+b=700 ;a=700-b
b+c=500 ; c=500-b
a+c =800
a+b+b+c+a+c=700+500+800
2a+2b+2c=2000
2(a+b+c)=2000
a+b+c=1000 (aici inlocuim pe a si c de mai sus)
700-b + b +500 -b =1000
b =700+500-1000
b =200
a=700-b
a =700-200 =500
c =500-b
c =500-200 =300
verif ; a+b+c=1000
a+b =700 ;500+200 =700
b+c =500 ;200+300=500
a+c =800 ;500+300=800
b+c=500 ; c=500-b
a+c =800
a+b+b+c+a+c=700+500+800
2a+2b+2c=2000
2(a+b+c)=2000
a+b+c=1000 (aici inlocuim pe a si c de mai sus)
700-b + b +500 -b =1000
b =700+500-1000
b =200
a=700-b
a =700-200 =500
c =500-b
c =500-200 =300
verif ; a+b+c=1000
a+b =700 ;500+200 =700
b+c =500 ;200+300=500
a+c =800 ;500+300=800
