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sumujemy
3x+2y=2
3*(-)+2y=2
2y=2+
2y=
y=
b)
sumujemy
c)
sumujemy
a)
3x+2y=2 /*(-2)
5x+4y=9
-6x-4y=-4
+ 5x+4y=9
-1x=5
x=-5
3x+2y=2
x=-5
-15+2y=2
2y=2+15
2y=17
y=8,5
b)
3x+4y=9
2x+2y=10 /* (-2)
3x+4y=9
+ -4x-4y=-20
-1x=-11
x=11
2x+2y=10
x=11
22+2y=10
2y=-12
y=-6
c)
2x+3y=8/ * (-2)
4x+5y=15
-4x-6y=-16
4x+5y=15
-1y=-1
y=1
2x+3y=8
y=1
2x+3=8
2x=5
x=2,5
Mam nadzieję, że pomogłam :)