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50:(50+x)=0,4.x=?. repede . dau coroana

Răspuns :

50:(50+x)=4:10
(50+x)4=50×10
200+4x=500
4x=500-200
4x=300
X=300:4
Coroana??
50:(50+x)=4:10
(50+x)4=50x10
200=4x=500
4x=300
X=300:4
X=75