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repede , am mare nevoie..​


Repede Am Mare Nevoie class=

Răspuns :

x+4/5*x=45  

5x+4x= 225

9x=225

x = 225:9

x = 25

a+4/5*a=45

5a+4a=225

9a=225

a=225:9

a=25