document.write( "Question 251141: 9x-4(7x-8x)=x-3\r
\n" ); document.write( "\n" ); document.write( "how does x = -4
\n" ); document.write( "i don't understand how to get to the answer \n" ); document.write( "

Algebra.Com's Answer #182906 by College Student(505) $\"\"$ $\"About$

You can put this solution on YOUR website!
Problem: $\"9x-4%287x-8x%29=x-3\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"9x-4%287x-8x%29=x-3\"$
\n" ); document.write( " $\"9x%2B%28-4%2A7x%29%2B%28-4%2A%28-8x%29%29=x-3\"$
\n" ); document.write( " $\"9x-28x%2B32x=x-3\"$
\n" ); document.write( " $\"%289-28%2B32%29x=x-3\"$
\n" ); document.write( " $\"13x=x-3\"$
\n" ); document.write( " $\"13x-x=-3\"$
\n" ); document.write( " $\"12x=-3\"$
\n" ); document.write( " $\"x=-3%2F12\"$
\n" ); document.write( " $\"x=-1%2F4\"$ <--- this is the x value, not -4.\r
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\n" ); document.write( "\n" ); document.write( "If x=-4, this is how it would turn out:
\n" ); document.write( " $\"9x-4%287x-8x%29=x-3\"$
\n" ); document.write( " $\"9%28-4%29-4%287%28-4%29-8%28-4%29%29=%28-4%29-3\"$
\n" ); document.write( " $\"-36-4%28-28%2B32%29=-7\"$
\n" ); document.write( " $\"-36-4%284%29=-7\"$
\n" ); document.write( " $\"-36-16=-7\"$
\n" ); document.write( " $\"-52=-7\"$ <--- we can see here x cannot equal to -4 \n" ); document.write( "

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