Question

Rozwiaz uklad rownan

{x + 2 / 3 = 4 - 5 / -4

{3x + 2y = 6

{2x - y =4

{x-3/4=y-2 /3

Answer 1

1. x+2/3=4-5/-4

    3x+2y=6

 

    x=1/4 -2/3=3/12-8/12= -5/12

    3*(-5/12)+2y=6

 

    x=-5/12

   -5/4+2y=6

 

    x=-5/12

    2y= 6+5/4/:2

 

    x=-5/12

    y=3 5/8

 

 

2. 2x-y=4

    x-3/4=y-2/3

 

   2x-y=4

   x=y-8/12+ 9/12

 

   2x-y=4

   x=y+1/12

 

  2(y+1/12)-y=4

  x=y+1/12

 

  2y+ 2/12=4

  x=y+1/12

 

  2y=48/12-2/12=46/12 /*1/2

  x=y+1/12

 

  y=46/24

  X=46/24 +1/12= 46/24+2/24=48/24=2