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(8×8-32-12:k)-(40-2×10)=3×3

Răspuns :

(8×8-32-12:k)-(40-2×10)=3×3
=(64-32-12:k)-(40-20)=9
=(32-12:k)-20=9
=32-12:k=29
=12:k=32-29
=12:k=3
k=12:3
k=4

Succes!