👤

cum se calculeaza:
X+25\100X=80


Răspuns :

x + 1/4 · x= 80          ( inmultim cu 4 )
4x +x = 320
5x =320
x= 320: 5 
x=64
x +1/4·x= 80    |  · 4
4x +1/4x·4= 80·4
4x+x=320
5x=320
x= 320/5 
x=64