Question

a) 2×+10= -18 b) 5× = 35 c) 12+ × =22 d) 3× + 10 = 40 e) 5.(× - 2) = 2. (× + 8) f) 7× = 6.(× - 3)

Answer 1

Resposta:

a) 2×+10= -18

   2x = -18 -10

   2x = -28

     x = -28/2

     x = -14

b) 5× = 35

      x = 35/5

      x = 7

c) 12+ × =22

          x = 22 - 12

          x = 10

d) 3× + 10 = 40

    3x = 40 - 10

    3x = 30

      x = 30/3

      x = 10

e) 5.(× - 2) = 2. (× + 8)

    5x -10 = 2x + 16

    5x -2x = 16 + 10

       3x    = 26

         x    = 26/3

f) 7× = 6.(× - 3)

  7x = 6x - 18

  7x - 6x = -18

         x   = -18

Explicação passo a passo:

Answer 2

a) 2x + 10 = -18

2x = -18 - 10

2x = -28

x = $\frac{-28}{2}$

x = 14

b) 5x = 35

x = $\frac{35}{5}$

x = 7

c) 12 + x = 22

x = 22 - 12

x = 10

d) 3x + 10 = 40

3x = 40 - 10

3x = 30

x = $\frac{30}{3}$

x = 10

e) 5.(x - 2) = 2.(x + 8)

5x - 10 = 2x + 16

5x - 2x = 16 + 10

3x = 26

x = $\frac{26}{3}$

f) 7x = 6.(x - 3)

7x = 6x - 18

7x - 6x = -18

x = -18