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5/8x -20%*(5/8x)=16
5/8x - 1/5 * 5/8x =16
5/8x - 5/40x=16
25/40x - 5/40x =16
20/40x =16
1/2x =16
x=32
spr.
5/8*32=5/1 *4=20<--- tylu miało pojechać
20- 0,2*20=20-4=16 <--- tylu pojechało
odp.
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