Respostas

2013-12-10T16:58:31-02:00
P = 2b + 2h
36 = 2x + 2(x+2)
36=2x+2x+4
4x=36-4
x=32/4
x=8cm                 y=8+2=10cm            
As medidas são 8 e 10 cm.

5 4 5
2013-12-10T17:25:11-02:00
2x+2y=36
x=y+2

2.(y+2)+2y=36
2y+4+2y=36
4y=36-4
4y=32
y=32/4
y=8

2x+2y=36
2x+2.8=36
2x+16=36
2x=36-16
2x=20
x=20/2
x=10

As medidas são 10 de comprimento e 8 de largura.
3 4 3