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a fost răspuns

(7×9-x×5)-9÷3=20
cum se face?

Răspuns :

AnaMaria2016
(63 -5x ) -9 :3= 20
(63-5x) -3 =20
63-5x-3=20
5x=63-20 +3
5x=  53+ 3
5x= 56
x= 56\5 
Danghinea74


(7*9-x*5)-9/3=20
(63-5x)-3=20
63-5x=23
-5x=23-63
-5x=-40
-x=-8
x=8