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27,5km patrati + 2x=284300ari

Răspuns :

27,5km²+ 2x=284300ari
284300ari =28,43 km²
27,5km²+ 2x=28,43 km²
2x=28,43 km²-27,5 km²
2x=0,93 km²
x=0,465 km²
x=4650 ari