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3x y 5x
Entonces:
Perímetro = 3x + 5x
160cm = 8x
Despejamos x
160/8 = x
x = 20
Reemplamos:
5x = 5 x 20 = 100/ 2 = 50cm de largo.
3x = 3 x 20 = 60/2 = 30cm de ancho.
Perímetro = 2(ancho) + 2(largo)
160cm = 2(30) + 2(50)
160cm = 60 + 100
160cm = 160cm
R:// Los lados de la mesa miden 50cm de largo y 30cm de ancho.
Espero haberte ayudado!