what is the value of y in the equation (y/(2y-x))=0.5

This exact question was answered for you yesterday.

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calculus - drwls, Monday, January 24, 2011 at 11:39pm

Rewrite it as an equation for y in terms of x.

y - 0.5 x = y

This means x = 0

For the equation to be true, x must be zero. y can be anything.