document.write( "Question 171949: Please help I do not understand this problem and here it is: build each Rational expression into an equivalent rational expression with the indicated denominator. \r
\n" ); document.write( "\n" ); document.write( "-7yt/3x= (?)/18xyt \n" ); document.write( "

Algebra.Com's Answer #127036 by Mathtut(3670) $\"\"$ $\"About$

You can put this solution on YOUR website!
basically they want you to cross multiply....this is like a direct proportion problem....and your solving for one of the unknowns....lets call our unknown(?)...z
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\n" ); document.write( " $\"-7yt%2F3x=z%2F18xyt\"$
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\n" ); document.write( "to solve for z just cross multiply the -7yt term with the 18xyt term
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\n" ); document.write( " $\"%28-7yt%29%286cross%2818%29cross%28x%29yt%29%2Fcross%283%29cross%28x%29=z\"$
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\n" ); document.write( " $\"highlight%28z=-42y%5E2t%5E2%29\"$
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