Question

ache o valor x b) 4X – 12 = 12

c) 8 + 6X = 2X + 12




d) X + 3X + 20 = 20

Answer 1

Resposta:

A)

6x = 2x + 16

6x - 2x = 16

4x = 16

x = 16/4

x = 4

B)

2x-5=x+1  

2x - x = 1 + 5

x = 6

C)

2x+3=x+4  

2x - x = 4 - 3

x = 1

D)

5x+7=4x+10  

5x - 4x = 10 - 7

     x = 3

E)

4x-10=2x+2

4x - 2x = 2 + 10

2x = 12

 x = 12/2

 x = 6

F)

    4x-7=8x-2  

4x - 8x = -2 + 7

     -4x = 5      .(-1)

      4x = -5

        x = -5/4

G)

2x+1=4x-7

2x - 4x = -7 - 1

    -2x = -8        .(-1)

      2x = 8

       x = 8/2

       x = 4

H)

9x+9+3x=15

9x + 3x = 15 - 9

12x = 6

  x = 6/12

  x = 3/6

  x = 1/3

I)

16x-1=12x+3

16x - 12x = 3 + 1

4x = 4

 x = 4/4

 x = 1

J)

3x-2=4x+9  

3x - 4x = 9 + 2

    -x = 11   .(-1)

     x = -11

K)

5x+-3+x=2x+18

5x + x - 2x = 18 + 3

6x - 2x = 21

     4x = 21

       x = 21/4

L)

17x+7x=x+18  

24x - x = 18

23x = 18

   x = 18/23

M)

x+x-4=17-2  

2x = 15 + 4

2x = 19

 x = 19/2

N)

x+2x+4-5x=4x-9  

3x - 5x - 4x = -9 - 4

3x - 9x = - 13

    -6x = -13     .(-1)

     6x = 13

       x = 13/6

O)

5x+6x=3x+2x-4  

11x - 3x - 2x = -4

11x - 5x = -4

6x = -4

 x = -4/6

 x = -2/3

P)

          5x+4=3x-2x+4

5x - 3x + 2x = 4 - 4

      2x + 2x = 0

             4x = 0

              x = 0/4

              x = 0

Espero ter ajudado

Answer 2

Explicação passo-a-passo:

4X – 12 = 12

4x=12+12

4x=24

x=24/4

x=6

8 + 6X = 2X + 12

6x-2x=12-8

4x=4

x=4/4

x=1

X + 3X + 20 = 20

4x+20=20

4x=20-20

4x=0

x=0/4

x=0