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2014-09-04T14:21:30+03:00
Fie x=lungimea segmentului

2x=x:3+60
 2x- \frac{x}{3} =60

6x-x=180
5x=180
x=180:5
x=36 cm
2014-09-04T14:21:40+03:00
Fie x segmentul 

2x= 60+x/3
6x=180+x
6x-x=180
5x=180
x=180:5
x= 36 cm