Question 288955
Hello, 
Let's write this  2zy over y2 equals 14 over y as:
2zy/y2=14/y (I take it that y2 is y to the second power?)If so then multiply both sides by y^2 to get:
2zy=14y Divide both sides by 2y to get:
z=7
There you go. Make sense?
RJ 
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www.math-unlock.com