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Alexandraoana41
a fost răspuns

( 7 x 9- X x 5 ) - 9 :3 =20   cum???

Răspuns :

RoxyBestOne
(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 

Nipo
(7x9-Xx5)-9:3=20
(7x9-Xx5)=20
63-Xx5-3=20
60-Xx5=20
40=X*5
x=8

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