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Află numărul necunoscut a * 5 = 35 5 * a 40; a / 5 = 8 45 / a = 5 a * 4 36 a / 47 7 * a = 21 a / 3 = 8​

Răspuns :

  1. sterge acest comment...mam gresit

Răspuns:

[tex]a*5 = 35= > a = 35 : 5= > a = 7\\\\5 *a = 40= > a = 40 : 5= > a = 8\\\\a : 5 = 8= > a = 8 * 5= > a = 40\\\\45 : a = 5= > a = 45 : 5= > a = 9\\\\a * 4 = 36= > a = 36 : 4= > a = 9\\\\a : 4 = 7= > a = 7 * 4= > a = 28\\\\7*a=21= > a=21:7= > a=3\\\\a:3=8= > a=3*8= > a=24[/tex]