Respostas

  • Usuário do Brainly
2013-10-06T22:50:48-03:00
X - y = 20---- x= 20+ y
x/y = 4/3
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20 + y / y = 4/3
4.y = 3.( 20 + y )
4y = 60 + 3y
4y - 3y = 60
y = 60
--------------
x = 20 + y
x = 20 + 60
x = 80
------------------
S = { 80, 60 }

80:20      4
----    = ---------
60:20      3