Question

Determina numărul natural abc , știind ca: abc+bc+c=161
(Rezolvare)

Answer 1

abc+bc+c=161

a*1+b*2+c*3=161
3c=b+1
b=a:(2+3)
a=161-(b+c)

a=100
b=100:5
b=20
c=(20+1):3
c=7

100+20*2+7*3=
=100+40+21
=140+21
=161

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abc=127
___   __
127+ 27+7=
=154+7
=161