Răspunsuri

2014-03-05T19:55:47+02:00
X+x+10=120⇔2x=110⇔x=110/2⇔x=55 nuci in primul cos si 65 de nici in al doilea
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2014-03-05T19:56:07+02:00
A+b=120
a=b-10=>b=a+10
a+a+10=120
2a=110
a=110:2=55
b=55+10=65
2 5 2