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10*{x-10*[216+10*(24+24:4)]}

Răspuns :

10* {x-10*[216+10*(24+6)]}=
=10* [x-10*(216+10*30)]=
=10* [x-10*(216+300)]=
=10* (x-10*516)=
=10* (x-5160)=
=10x-51600