Question

Okrutna matematyka :( PILNE. Daje naj i podziękowanie .

a) 5x-1=x/2-1/2-3x/4+2/4

b)x/6=1/6(x-2)+1

c)6x-2x/2+5/2=4-3x/2-1/2

Pomóżcie

Answer 1

a) 5x-1=x/2-1/2-3x/4+2/4   /*8

     40x-4x+6x=-4+4+1

     42x=1

      x= 1/42

 

b)x/6=1/6(x-2)+1

     x/6=1/6x-1/3+1

     x/6-1/6x=-1/3+1

     2x-2x=-4+1

      0≠-3

 

c)6x-2x/2+5/2=4-3x/2-1/2   

    6x-2x/2+3x/2=4-1/2-5/2      /*2

    12x-2x+3x=8-1-5

     13x=2

     x=2/13

Answer 2

a) 5x-1=x/2-1/2-3x/4+2/4

20x-4=2x-2-3x+2

20x-2x+3x=-2+2+4

21x=4 /:21

x=4/21

 

b) x/6=1/6(x-2)+1 /*6

x=1(6x-12)+6

x=6x-12+6

x-6x=-12+6

-5x=-6 /:(-5)

x=6/5

x=1 1/5

 

c) 6x-2x/2+5/2=4-3x/2-1/2 /*2

12x-2x+5=8-3x-1

12x-2x+3x=8-1-5

13x=2 /:13

x=2/13