Respostas

2014-06-23T13:09:07-03:00

x = 11y/3, substituindo na soma:
11y/3 + y = 7
(11y + 3y)/3 = 7
14y = 7.3
14y = 21
y = 21/14 (/3)
y = 3/2 ====>>>> x = 11y/3 => x = 11/3.3/2 => x = 11/2

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