Respostas

2013-06-03T20:27:17-03:00

2x + 4 = 12 +6x

4-12=6x-2x

-8=4x

x= -2

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2013-06-03T20:30:29-03:00

vejamos

 

2(x+2)=3(4+2x)

2x+4=12+6x

2x-6x=12-4

-4x=8  *(-1)

4x=-8

x=-8/4

x=-2

2 5 2