Rozwiąż metodą przeciwnych współczynników 7x-3y=10 -2x+5y=-7
{7x-3y=10 /*5
{-2x+5y= -7 /*3
{35x-15y=50
{-6x+15y= -21
___________
29x=29
x=1
{x=1
{7x-3y=10
{7*1-3y=10
{7-3y=10 /-7
{-3y=3 /:(-3)
{y= -1
SPRAWDZENIE:
* 7x-3y=10
7*1-3*(-1)=10
7+3=10
10=10
* -2x+5y= -7
-2*1+5*(-1)= -7
-2-5= -7
-7= -7
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{7x-3y=10 /*5
{-2x+5y= -7 /*3
{35x-15y=50
{-6x+15y= -21
___________
29x=29
x=1
{x=1
{7x-3y=10
{x=1
{7*1-3y=10
{x=1
{7-3y=10 /-7
{x=1
{-3y=3 /:(-3)
{x=1
{y= -1
SPRAWDZENIE:
* 7x-3y=10
7*1-3*(-1)=10
7+3=10
10=10
* -2x+5y= -7
-2*1+5*(-1)= -7
-2-5= -7
-7= -7