Question

Zad 10/str. 103 - Matematyka z plusem do 2 klasy gim.

Answer 1

a){x/2+y/3=1 1/3 / *6

   {x/3-y/2=2 1/3/*6

 

  {6x/2-6 y/2=6*1 1/3

  {6 x/3-6 y/2=6*21/3

 

  {3x+2y=6-4/3

  {2x-3x=6*7/3

 

  {3x+2y=8/*3

  {2x-3y=14 /*2

 

  {9x+6y+24

  {4x-6y=24

+__________

  13x=52/ /13

  x=4

 3x+2y=8

 3*4+2y=8

 12+2y=8

 2y=8-12

 2y=-4/ /2

 y=2

 

  {x=4

  {y=-2

 

 b) {3/5x+1/2y=2 /*10

     {1/2 (2x-y)=2 /*10

     6x+5y=20

     10x-2x=20

 +__________________

 

sorki ale dalej juz nie mam :O :(