Răspunsuri

2014-09-25T10:01:52+03:00
2014-09-25T10:03:45+03:00
P = 50
L = l + 5
P = 2l + 2L 
50 = 2l + 2( l + 5 )
50 = 2l + 2l + 10
50 = 4l + 10
50 - 10 = 4l
40 = 4l 
l = 40 : 4
l = 10 
L = l + 5
L = 10 + 5
L = 15
A = l x L
A = 10 x 15
A = 150

7 4 7