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y-druga liczba
x+y=16
x-y=8
2x=8
x=4
16-4=12
x=4
y=12
x-y=8
____
2x=16+8
x=12
12+y=16
y=16-12
y=4
x+y=16
x-y=8
x=16-y
16-y-y=8
x=16-y
16-2y=8
x=16-y
16-8=2y
x=16-y
8=2y /:2
x=16-y
y=4
x=16-4
y=4
x=12
y=4
Spr
12+4=16
16=16
12-4=8
8=8