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SEA "x" y "2x" LOS LADOS DEL RECTÁNGULO, SE TIENE:
x + x + 2x + 2x = 48
6x = 48
x = 8
LUEGO:
UN LADO: x = 8
OTRO LADO: 2x = 2(8) = 16
ESO ES TODO, SALUDOS...........................
Largo(L)=2x....... 2(8)= 16
Ancho(A)=x........8
P= 2L + 2A ........... 48= 2(2x) + 2(x)
48 = 4x + 2x
48 = 6x
x = 8