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x+3y = -3
3x - y= 11
Pilne!!
3y = x+3
2x + y= -6
Pilne!!
x + y= 51
x - 3= (y - 3) * 4
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1)
x+3y = -3 I*(-3)
3x - y= 11
-3x-9y= 9
3x - y=11
-10y= 20 I:(-10)
y= -2
x+3y= -3
x - 6= -3
x= 3
1)
{x+3y = -3
{3x - y= 11
{x=-3-3y
{3*(-3)-3y-y=11
-9-4y=11
-4y=11+9
-4y=20/:(-4)
y=5
x+3*5=-3
x+15=-3
x=-3-15
x=-18
{x=-12
{y=5
2)
{3y = x+3
{2x + y= -6
x=3y-3
2*(3y-3)+y
6y-6+y=-6
7y=0/:7
y=0
2x+0=-6
2x=-6/:2
x=-3
{x=-3
{y=0
3)
{x + y= 51
{x - 3= (y - 3) * 4
{x=51-y
{x-3=(y-3)*4
51-y-3=4y-12
-y-4y=-12+3-51
-5y=-60/:(-5)
y=12
x+12=51
x=51-12
x=39
{x=39
{y=12