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Gaseste numerele a,b ,c stiind ca :
a+1=40+b-40=c-1=a+b+c-40


Răspuns :

a+1=b=c-1=a+b+c-40 a+41=b+40=c+39=a+b+c => b+c=41 a+c=40 a+b=39 2b+2c+2a=41+40+39=120 a+b+c=60 =>a=19 b=20 c=21