Question

Encuentra mentalmente el valor de x y comprueba la solución . a) x-9=2 b)2x-14=0 c)x/4=8 d)5x-3=-18 e)3x=3/4 f)6-x=10

Answer 1

Resolver.

a)

x - 9 = 2

x = 2 + 9

x = 11

Reemplazamos la variable.

11 - 9 = 2

2 = 2

...............................................................

b) 2x - 14 = 0

2x = 14
 
  x = 14/2
  
  x = 7

...................................................................

c)

x/4 = 8

x = 8(4)

x = 32

Reemplazas la variable x.

32/4 = 8

8 = 8

.......................................................................

d)

5x - 3 = - 18

5x = - 18 + 3

5x = - 15
 
  x = - 15/3
 
  x = - 5
 
............................................................................

e)

3x = 3/4
 
  x = 3/4 / 3/1
 
  x = (3/4)/(3/1)
 
 x = (3 * 1)/(3*4)
 
 x = 3/12
 
 x = 1/4

.................................................................

f)

6 - x = 10

- x = 10 - 6

- x = 4
 
   x = - 4