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{x=-5
{-5-y=18
{x=-5
{-5-18=y
{x=-5
{y=-23
{x=-5
-----------------------------------
{x-y=20
{y=-35
{x-(-35)=20
{y=-35
{x+35=20
{y=-35
{x=20-35
{y=-35
{x=-15
{y=-35
-5-y=18
-y=18+5
-y=12/*(-1)
y=-23
2)x-y=20
x-(-35)=20
x+35=20
x=20-35
x=(-15)
proszę liczę na naj :)