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x-2
(x-2)-2=x-4
(x-2-2-2=x-6
x-2+x-4+x-6=24
3x-12=24
3x=36
x=12
boki trójkąta:
10, 8, 6
spr z tw. pitagorasa:
6^2+8^2=10^2
36+64=100