Răspunsuri

2014-09-19T17:26:53+03:00

Fie x = lungimea

y- latimea.

y= 1/3 * x

2x + 2 y = 80

2x + 2 * 1/3x = 80

2x+ 2/3 x = 80

Aducem la acelasi numitor = > 6x +2x = 240 => 8x = 240 => x= 30 cm.

y= 1/3 * 30= 10 cm.



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