To sa układy rownan
!rozwiaz układy rownan
b){5x+3y=0
-x-2y=7
c){3u+2v=2
5u+4v=6
i dzieki z góry
b)
5x+3y=0
-x-2y=7 |*5
-5x-10y=35
_______________
-7y=35
y=-5
-x-2*(-5)=7
-x+10=7
-x=-3
x=3
c)
3u+2v=2 |*(-2)
-6u-4v=-4
_____________
-u=2
u=-2
5*(-2)+4v=6
-10+4v=6
4v=16
v=4
b) 5x+3y=0
-x-2y=7 /*5
-----------------
-7y=35 /:(-7)
-x-2y=7 /*3
10x+6y=0
-3x-6y=21
7x=21 /:7
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b)
5x+3y=0
-x-2y=7 |*5
5x+3y=0
-5x-10y=35
_______________
-7y=35
y=-5
-x-2*(-5)=7
-x+10=7
-x=-3
x=3
x=3
y=-5
c)
3u+2v=2 |*(-2)
5u+4v=6
-6u-4v=-4
5u+4v=6
_____________
-u=2
u=-2
5*(-2)+4v=6
-10+4v=6
4v=16
v=4
u=-2
v=4
b) 5x+3y=0
-x-2y=7 /*5
5x+3y=0
-5x-10y=35
-----------------
-7y=35 /:(-7)
y=-5
-x-2y=7 /*3
10x+6y=0
-3x-6y=21
-----------------
7x=21 /:7
x=3
x=3
y=-5
c)
3u+2v=2 |*(-2)
5u+4v=6
-6u-4v=-4
5u+4v=6
-----------------
-u=2
u=-2
5*(-2)+4v=6
-10+4v=6
4v=16
v=4
u=-2
v=4