Question

Resolva:

A) 3(x-1)=5-2x

B) 2+2x=6(x-5)

C) 5x-2(x-1)=7-4x

D) 2(x+1)=3(x+2)

E) 3x+2(x+1)=3x-2

F) 2(x-1)=3x+1+3

Answer 1

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A) 3(x - 1) = 5 - 2x
     3x - 3 = 5 - 2x
     5x = 8
       x = 8/5 

B) 2 + 2x = 6(x - 5)
    2x + 2 = 6x - 30
    6x - 2x = 30 + 2
    4x = 32
    x = 8 

C) 5x - 2(x - 1) = 7 - 4x
     5x - 2x + 2 = 7 - 4x
     3x + 2 = 7 - 4x
     7x = 5
       x = 5/7


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

E) 3x + 2(x + 1) = 3x - 2
     3x + 2x + 2 = 3x - 2  
     2x = -4
     x = -2
     

F) 2(x - 1) = 3x + 1 + 3
    2x - 2 = 3x + 4
    3x - 2x = -2 - 4
    x = -6
    

Answer 2

a) 3x -3 = 5-2x
    3x +2x= 5 +3
      5x = 8
        x= 8/ 5

b) 2 +2x=6x-30
     2x-6x= -30-2
      -4x = -28 (-1)
       4x = 28
        x= 28/4
        x = 7

c)  5x -2x+2=7 -4x
     5x-2x+4x=7-2
      7x=5
       x= 5/7

d) 2x+2=3x+6
     2x -3x=6-2
      -x= 4 (-1)
       x= -4

e) 3x +2x+2=3x-2
    3x+2x-3x=-2-2
    2x= -4
      x= -4/2
      x= -2

f) 2x -2=3x +1+3
    2x -3x= +1+3+2
     -x = 6 (-1)
      x = -6