Rozwiąż układ równań metodą podstawiania:
x+y=3
x-2y=6
x-y=5
3x+4y=8
2x-3y=-5
-x+5y=6
3x-3y+3=0
x+1/2y-2=0
4x-2y=6
3x+6y=12
3x-4y=14
-2x+7y=-18
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x+y=3
x-2y=6
x=3-y
3-y-2y=6
x=3-y
-3y=3/(-3)
x=3-(-1)
y=-1
x=4
y=-1 (4,-1)
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x-y=5
3x+4y=8
x=5+y
3(5+y)+4y=8
x=5+y
15+3y+4y=8
x=5+y
7y=-7/7
x=5-1
y=-1
x=4
y=-1
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zadanie w zalaczniku