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[(21:a)+(7*5)]:6-2=5
dau 10 puncte si coroana ajutor


Răspuns :

(21 : a + 35 ) : 6 = 5+2
(21 : a +35) : 6 = 7
21 : a +35 = 7*6
21 : a +35 = 42
21 : a = 42-35
21 : a = 7
a = 21 : 7
a = 3
(21:a+35):6=5+2
(21:a+35):6=7
(21:a+35)=7×6
(21:a+35)=42
21:a=42-35
21:a=7
a=21:7=
a=3