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(7 X7 -6x6 +u) -24:3 -2x10=81:9

Răspuns :

(49-36+u)-8-20=9
(13+u)-8=9+20=29
13+u=29+8=37
u=37-13=24

(49-36+u)-8-20=9
(13+u)-8=20+9=29
13+u=29+8=37
u=37-13=24 sper ca team ajutata!"