Flávia Barbosa
24/01/2018 • 17:41
36 + x = 20/100 (360 + x)
3600 + 100x = 7200 + 20x
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100
80x = 3600
x = 45
3600 + 100x = 7200 + 20x
------------------------------------
100
80x = 3600
x = 45