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Rog ajutor.. (20:a+20):6=50:10.


Răspuns :

( 20 : a + 20 ) : 6 = 50 : 10

( 20 : a + 20 ) : 6 = 5

20 : a + 20 = 6 × 5

20 : a + 20 = 30

20 : a = 30 - 20

20 : a = 10

a = 20 : 10

a = 2
(20:a+20):6=50:10
(20:a+20):6= 5
20:a+20= 5×6
20:a+20= 30
20:a= 30-20
20:a= 10
a= 20:10
a= 2