Respostas

  • Usuário do Brainly
2014-08-28T18:58:03-03:00
3 ( x + 4 ) = ( x - 2 ) + ( 4x + 6 )
3x + 12 = x - 2 + 4x + 6
3x - x - 4x = - 2 + 6 - 12
- 2x = - 8 .(-1)
2x = 8
x = 8 : 2
 x= 4
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