Question

se stie ca x supra y egal cu 3 supra 7, si y supra z egal cu 7 supra 12. se cere valoarea raportului x supra z
ajutati ma dau coroana..

Answer 1

x/y = 3/7
y/z = 7/12, de unde z/y = 12/7
x/z = (x/y)/(z/y) = 3/7 : 12/7 = 3/7 x 7/12 = 1/4
x/z = 1/4
 

Answer 2

x/y=3/7
y/z=7/12
x/z=?

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x=3y/7
z=12y/7

x/z=3y/7/12y/7 = 3y/7•7/12y = 1/4