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2(x-1)+9=2(y+1)-5
x+y+4=2x+13-y
2x-2+9=2y+2-5
x+y-2x+y=13-4
2x-2y= -3-7
-x+2y=9
2x-2y= -10 dodajemy stronami
x= -1
-x+2y=9
2y=x+9
2y= -1+9
2y=8 //:2
y=4
x= -1
y=4
Odp.: A
x+y+4=2x+13-y
x=2y-9
do 2 podstawiam
2(2y-10)+9=2y+2-5
4y-20+9=2y-3
2y=8/:2
y=4
x=8-9=-1
odp A x=-1 y=4