Question 204352: I need help with this rational expression please:
I am supposed to build a rational expression into an equivalent
rational expression with the indicated denominator.
(-7yt)/3x=?/18xyt
Here is my try: (-7yt)/3x= -42yt/18xyt
Thanks
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! Very good,,,just slightly off
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Let the ? be the expression you would place in the numerator to fit.
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(-7yt)/(3x) = ? / (18xyt)
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lets cross multiply
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(3x) * ? = (-7yt)(18xyt)
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(3x)*? = -7*18 * x*y^2*t^2
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divide thru by 3x
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? = -42 y^2 t^2
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to check
(-42y^2t^2) / (18xyt) = (-7 y t) / 3 x,,,,ok
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Have a good day
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