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Determinati valoarea raportului x supra y stiind ca x -y supra y = 3 supra 4

Răspuns :

x-y/y=3/4
4(x-y)=3y
4x-4y=3y
4x=3y+4y
4x=7y
x=7y/4
x/y=7y/4/y=7y/4:y=7y/4x1/y=7y/4y=7/4