Odpowiedź :
x-y = 1
x+y = 3
x= y+1
x+y=3
x=y+1
y+1+y=3
x=y+1
2y+1=3
x=y+1
2y=2
x=y+1
y=1
x=2
y=1
spr
2-1 = 1
2+1=3
x+y = 3
x= y+1
x+y=3
x=y+1
y+1+y=3
x=y+1
2y+1=3
x=y+1
2y=2
x=y+1
y=1
x=2
y=1
spr
2-1 = 1
2+1=3