Răspuns :
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]