Rozwiąż układy równań:
a) x+2y=9
y-1=3x
a) x+2y=9
y-1=3x
Najlepsza Odpowiedź!
Mamy układ:
{ x+2y=9
{y-1=3x
{ x+2y=9
{-3x+y=1
{x=9-2y
{-3(9-2y)+y=1
{x=9-2y
(-27+6y+y=1
{x=9-2y
{7y=28
{x=9-2y
{y=4
{x=9-2(4)
{y=4
{x=1
{y=4
{ x+2y=9
{y-1=3x
{ x+2y=9
{-3x+y=1
{x=9-2y
{-3(9-2y)+y=1
{x=9-2y
(-27+6y+y=1
{x=9-2y
{7y=28
{x=9-2y
{y=4
{x=9-2(4)
{y=4
{x=1
{y=4
A) x+2y=9
y-1=3x
x +2y = 9 /*3
-3x+y =1
<metoda preciwnych wspolczynnikow>
3x +6y = 27
-3x +y =1
7y = 28
y=4
y=4
x+2*4 = 9
y=4
x= 1
:)
y-1=3x
x +2y = 9 /*3
-3x+y =1
<metoda preciwnych wspolczynnikow>
3x +6y = 27
-3x +y =1
7y = 28
y=4
y=4
x+2*4 = 9
y=4
x= 1
:)
{y-1=3x
{x+2y=9
{y=3x+1
{x+2(2x+1)=9
{y=3x+1
{x+4x+2=9
{y=3x+1
{x+4x=9-2
{y=3x+1
{5x=7 /:5
{y=3x+1
{x=⅕
{y=1⅗