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2x+y=10
4x-3y=10
y=10-2x
4x-3(10-2x)=10
y=10-2x
4x-30+6x=10
y=10-2x
10x=10+30
y=10-2x
10x=40
y=10-2x
x=4
y=10-2*4
x=4
y=2
x=4
2 funkcja.
x-3y=2
2x-y=14
x=2+3y
2(2+3y)-y=14
x=2+3y
4+6y-y=14
x=2+3y
5y=10
x=2+3y
y=2
x=2+6
y=2
x=8
y=2
3 funkcja.
x+y=8
2x-y=13
x=8-y
2(8-y)-y=13
x=8-y
16-2y-y=13
x=8-y
-3y=-3
x=8-y
y=1
x=7
y=1
4 funkcja.
x-y=3
x+2y=6
x=1+y
3+y+2y=6
x=1+y
3y=3
x=1+y
y=1
x=2
y=1
5 funkcja.
2x-2=4
x+y=6
x=6-y
2(6-y)-2=4
x=6-y
12-2y-2=4
x=6-y
-2y=4-12+2
x=6-y
-2y=-6
x=6-y
y=3
x=3
y=3