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7x = x^2 What is the value of x?

Guest May 20, 2015

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 #3
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This is the person who asked the question and I just wanted to say thank you for the help and explanations!

Guest May 21, 2015
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 #1
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$${\frac{{\mathtt{7}}{\mathtt{\,\times\,}}{\mathtt{x}}}{{\mathtt{x}}}} = {\frac{{{\mathtt{x}}}^{{\mathtt{2}}}}{{\mathtt{x}}}}$$

$${\mathtt{7}} = {\mathtt{x}}$$

Guest May 20, 2015
 #2
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Let's be careful with Anonymous' "method".......this is what is known as "thtowing away a root"

 

7x = x^2    subtract 7x from both sides

 

x^2 - 7x = 0      factor

 

x (x -7)  = 0       and setting both factors to 0, we have that x = 0  and x = 7....two solutions....!!!!

 

CPhill  May 20, 2015
 #3
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+5
Best Answer

This is the person who asked the question and I just wanted to say thank you for the help and explanations!

Guest May 21, 2015

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