Respostas

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2014-08-27T19:30:34-03:00
A)2(5Y+6)=34
10Y+12=34
10Y=22
Y=22/10

B) 3(5Y+6)=21
15Y+18=21
15Y=13
Y=13/15

C)5(5Y+6)
25Y+30=Y
24Y=-30
Y=-30/20
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