document.write( "Question 562644: |5x-1|+7=3x \n" ); document.write( "
Algebra.Com's Answer #364644 by issacodegard(60)\"\" \"About 
You can put this solution on YOUR website!
I'll prove that there is no solution.
\n" ); document.write( "Suppose that there is a solution x.
\n" ); document.write( "Then suppose 5x-1>=0. Then x>=1/5. And we have,
\n" ); document.write( "|5x-1|+7=3x
\n" ); document.write( "5x-1+7=3x
\n" ); document.write( "2x=-6
\n" ); document.write( "x=-3
\n" ); document.write( "But, this is not possible since x>=1/5.
\n" ); document.write( "So, suppose 5x-1<=0. Then x<=1/5. We have,
\n" ); document.write( "|5x-1|+7=3x
\n" ); document.write( "-(5x-1)+7=3x
\n" ); document.write( "-5x+1+7=3x
\n" ); document.write( "8x=8
\n" ); document.write( "x=1
\n" ); document.write( "But, this is not possible since x<=1/5.
\n" ); document.write( "So, by contradiction, there is no solution.
\n" ); document.write( "Looking at the graphs of the left hand and right hand sides of the equation will show that they don't intersect.
\n" ); document.write( "
\n" );