Răspuns :
Consideram x,y numerele ;
x-y=84 =>x=84+y
x+y=84*4
x+y=336
x-y+x+y=84+336
Se reduce -y cu y
2x=420
x=210
y=336-210 =>y=126 ;
Proba : 210-126=84 (corect)
x l----l
y l----l------l
-------
84 (diferenta)
84*4=336 (suma numerelor x,y)
336-84=252
252:2=126 (numarul x)
126+84=210 (numarul y)
x-y=84 =>x=84+y
x+y=84*4
x+y=336
x-y+x+y=84+336
Se reduce -y cu y
2x=420
x=210
y=336-210 =>y=126 ;
Proba : 210-126=84 (corect)
x l----l
y l----l------l
-------
84 (diferenta)
84*4=336 (suma numerelor x,y)
336-84=252
252:2=126 (numarul x)
126+84=210 (numarul y)
[tex]I \: \: \: \: \: \: \: \: /-----/ \\ \\ II \: \: \: \: /-----/ \underbrace{/- - -/}_{84} \\ \\ \it 84 \cdot 4 = 336 \: (suma~numerelor) \\ \it 336 - 84 = 252 \: (2~parti~egale~cu~numarul~mic) \\ \it 252:2 = 126 \: (primul~numar) \\ \it 126 + 84 = 210 \: (al~doilea~numar) \\ \\ \it 336 + 84 = 420 \: (2~parti~egale~cu~numarul~mare) \\ \it 420:2=210 \: (al~doilea~numar) \\ \it 210 - 84 = 126 \: (primul~numar) \\ \\ \it Numerele~cerute~sunt~126~si~210.[/tex]