document.write( "Question 204352: I need help with this rational expression please:
\n" ); document.write( "I am supposed to build a rational expression into an equivalent
\n" ); document.write( "rational expression with the indicated denominator.\r
\n" ); document.write( "\n" ); document.write( "(-7yt)/3x=?/18xyt\r
\n" ); document.write( "\n" ); document.write( "Here is my try: (-7yt)/3x= -42yt/18xyt\r
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Algebra.Com's Answer #154288 by RAY100(1637)\"\" \"About 
You can put this solution on YOUR website!
Very good,,,just slightly off
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\n" ); document.write( "Let the ? be the expression you would place in the numerator to fit.
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\n" ); document.write( "(-7yt)/(3x) = ? / (18xyt)
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\n" ); document.write( "lets cross multiply
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\n" ); document.write( "(3x) * ? = (-7yt)(18xyt)
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\n" ); document.write( "(3x)*? = -7*18 * x*y^2*t^2
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\n" ); document.write( "divide thru by 3x
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\n" ); document.write( "? = -42 y^2 t^2
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\n" ); document.write( "to check
\n" ); document.write( "(-42y^2t^2) / (18xyt) = (-7 y t) / 3 x,,,,ok
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\n" ); document.write( "Have a good day
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