Respostas

2013-08-19T00:12:24-03:00
Largura = x - 18
Comprimento = x

2x + 2(x-18) = 84

2x + 2x - 36 = 84

4x = 84 + 36

x = 120/4

x = 30

x-18 = y

30 - 18 = y
*************************************************************************
Ou seja. O terreno tem 30 metros de largura por 12 de altura.
*************************************************************************
30 + 30 + 12 + 12 = perimetro

****************************
perimetro = 84 metros.
****************************



1 5 1