Question

Resolva as equações a seguir;

A) 5(2x + 1) = 25

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

C) -(x - 1) + (3 - 2x) = 0

D) -(x + 1) - 2(x - 3) = 0

E) 1 - x + 2(-5 + 3x) = x

F) 7(2x + 1)- 6(x +8) = 12

G) 5(3 + 4x) - 6(7x - 5) = 2x - 1

H) 2x - 20 = 3(x + 1)

Answer 1

Resposta:

Explicação passo a passo:

A) 5(2x + 1) = 25

    10x+5=25

    10x=25-5

   10x=20

    x=20/10

     x=2

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

     -3x-3=4x-6

      4x+3x=6-3

       7x=3

        x=3/7

   

C) -(x - 1) + (3 - 2x) = 0

     -x+1+3-2x=0

   -3x+4=0

     3x=4

     x=4/3

D) -(x + 1) - 2(x - 3) = 0

     -x-1-2x+6=0

     -3x+5=0

   - 3x=-5

       x=5/3

E) 1 - x + 2(-5 + 3x) = x

   1-x-10+3x=x

    2x -9 =x

    2x-x=9

      x=9

F) 7(2x + 1)- 6(x +8) = 12

    14x+7-6x-48=12

     8x-41=12

     8x=12+41

     8x=53

      x=53/8

G) 5(3 + 4x) - 6(7x - 5) = 2x - 1

     15+20x-42x+30=2x-1

      45-22x=2x-1

        22x + 2x=45+1

           24x=46

            x=46/24

            x=23/12

H) 2x - 20 = 3(x + 1)

     2x-20=3x+3

      3x-2x=3-20

       x= -17