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x-AD obwód 1 trójkąta y-drugiego
x+y+35=53
x+20=y+15
x+y=18
x-y=-5
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2x=13
x=6,5
26,5=y+15
x=6,5
y+15=26,5
x=6,5
y=11,5
x=6,5
odp.x=6,5 a y=11,5