Respostas

  • Usuário do Brainly
2014-01-23T15:49:32-02:00
A) 2x+1+2x-3+2x-1=0
 2x+2x+2x=-1-1+1
 6x=-1
 x=-1/6

B)  2x+1(2x-3)=0
     2x+2x-3=0
     4x-3=0
     4x=3
       x=3/4
C) 2x-3-(2x-1)=2x+1
    2x-3-2x+1=2x+1
    2x-2x-2x=3-1+1
    -2x=3
    x=-3/2

D) 2x-3+2x+1(2x-1)
    2x-3+2x+2x-1=0
    2x+2x+2x=3+1
    6x=4
    x=4/6 ou x= 2/3
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