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(h:5-5)x9+18:6=400:10

Răspuns :

(h:5-5)×9+3=40
(h:5-5)×9=40-3
(h:5-5)×9=37
(h:5-5)=37:9
h:5-5=4,(1)
h:5=4,(1)+5
h:5=9,(1)
h=9,(1)×5
h=45,5