Question

Rozwiaz rownania; b) 3/10 - 1/2x + 2/5= - 1/5x + 1 1/10 + 3/10 x c)5/7 - 2 1/14x - 1 1/2= 2/7x-2 d) 2x-3/4- 1 1/5x= 2/5 - 1/10 e) x/5 - 2/3 + 1 1/2= x/10 - 3/5 -2x/3 f) 1/20 - 3x/2+2 1/5= x/4 - 7/5

Answer 1

 b) 3/10 - 1/2x + 2/5= - 1/5x + 1 1/10 + 3/10 x

     3/10 - 5/10x+4/10 = -2/10x +11/10 + 3/10x

     -5/10x+2/10x-3/10x=11/10-3/10-4/10

     -6/10x=4/10

        x=4/10 * (-10/6)

        x=-2/3

   

 c)5/7 - 2 1/14x - 1 1/2= 2/7x-2      /*14

     10-29x -21 = 4x-28

           -33x=-17

              x=17/11

  

 

 

 d) 2x-3/4- 1 1/5x= 2/5 - 1/10    /*20

     40x - 15 - 24x = 8 - 2

     16x=21

        x=21/16

    

 

e) x/5 - 2/3 + 1 1/2= x/10 - 3/5 -2x/3          /*30

    6x-20x+45 =3x - 18 - 20x

            3x=-63

            x=-21

 

 

 f) 1/20 - 3x/2+2 1/5= x/4 - 7/5         /*20

     1-30x+44 =5x-28

      -30x-5x=-28-1-44

       -35x= -73

            x=2,09