Question

É pra hj crrrrr me ajudem pfvrr

Answer 1

a)

x=8*3/12=2

b)

x=2,1*10/7=3

c)

x=15*3/4=45/4=11,25

d)

3*(x+6)=2*(x-6)

3x+18=2x-12

x=-30

e)

x+1,5=5x-30

4x=31,5

x=31,5/4=7,875

f)

(3/4)*(3/1)=1/2x

9/4=1/2x

2x=4/9

x=2/9=0,222...

Answer 2

Resposta:

Explicação passo a passo:

a) x.12 = 3.8

   12x = 24

      x = 24 / 12

      x = 2

b) 2,1 . 10 = x.7

   21 = 7x

   x = 21 / 7

   x = 21

c) 2.2x = 15.3

   4x = 45

     x = 45 / 4

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

   3x+18 = 2x-12

   3x-2x = -12-18

          x = -30

e) 1(x +1,5) = 5(x-6)

    x + 1,5 = 5x - 30

    x -5x = -30-1,5

       -4x = -31,5 (-1)

          x = 31,5 / 4

          x = 7,875

f) 3/4(x) = 1/3.1/2

  3/4.x = 1/6

4.1 = 4x.6

24x = 4

x = 4/24

x = 1/6