Question

Resolva as equações: a)5-20=5X-10-7X B)5-X-20=5X-10-7X C)X+6=2-3X D)y-6=5y+8 E)8-2X=4X-8 F)6X+3=2X-9 *URGENTE*

Answer 1

a)-5x+7x=-10+20

2x=10

x=10/2

x=5

b)-x-5x+7x=-10+20

x=10

c)x+3x=2-6

4x=4

x=4/4

x=1

d)y-5y=8+6

-4y=14 (-1)

4y=-14

y=-14/4

e)-2x-4x=-8-8

-6x=-16 (-1)

6x=16

x=16/6

f)6x-2x=-9-3

4x=6

x=6/4

Answer 2

a) 5 - 20 = 5x - 10 - 7x

- 5x + 7x = -10 + 20 - 5

  2x = -15 + 20

  2x = 5

 x = 5/2

b) 5 - x - 20 = 5x - 10 - 7x

  - 5x + 7x - x = - 10 + 20 - 5

 2x = -15 + 20

 2 x = 5

 x = 5/2

c) x + 6 = 2 - 3x

  x + 3x = 2 - 6

 4x = - 4

  x = -4/4

  x = -1

d) y - 6 = 5y + 8

y - 5y = 8 + 6

-4y = 14     (x- 1)

4y = -14

y = -14/4

y = -7/2

e) 8 - 2x = 4x - 8

   - 2x - 4x = - 8 - 8

   - 6x = - 16         ( x -1)

    6x = 16

    x = 16/6

    x= 8/3

f) 6x + 3 = 2x - 9

  6x - 2x = - 9 - 3

  4x = -12

   x = - 12/4

  x = - 3