document.write( "Question 703282: Hello, I have not taken math in 3 years and started calculus this semester but have forgotten everything! Can you please help me solve this question please..\r
\n" ); document.write( "\n" ); document.write( "Find all real numbers satisfying the inequality \"+%281%2F5%29x-x%3C16+\"
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Algebra.Com's Answer #433415 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
\"+%281%2F5%29x-x%3C16+\"
\n" ); document.write( "\"+x%2A%28+1%2F5+-+1+%29+%3C+16+\"
\n" ); document.write( "\"+%28-4%2F5%29%2Ax+%3C+16+\"
\n" ); document.write( "I need to multiply both sides by \"+-5%2F4+\" to
\n" ); document.write( "get \"+x+\" alone on the left side. Whenever you
\n" ); document.write( "multiply both sides by a negative number, the
\n" ); document.write( "sense of the inequality sign has to reverse, so
\n" ); document.write( "\"+x+%3E+%28-5%2F4%29%2A16+\"
\n" ); document.write( "\"+x+%3E+-20+\"
\n" ); document.write( "------------
\n" ); document.write( "I can check by saying \"+x+=+-20+\" which should fail
\n" ); document.write( "the inequality.
\n" ); document.write( " \"+%281%2F5%29x-x%3C16+\"
\n" ); document.write( "\"+%281%2F5%29%2A%28-20%29+-+%28-20%29+%3C+16+\"
\n" ); document.write( "\"+-4+%2B+20+%3C+16+\"
\n" ); document.write( "\"+16+%3C+16+\" fails, as it should
\n" ); document.write( "---------------
\n" ); document.write( "Now I try \"+x+=+-19+\", which is greater than \"+-20+\"
\n" ); document.write( " \"+%281%2F5%29x-x%3C16+\"
\n" ); document.write( " \"+%281%2F5%29%2A%28-19%29-%28-19%29%3C16+\"
\n" ); document.write( "\"+-19%2F5+%2B+19+%3C+16+\"
\n" ); document.write( "\"+-3.8+%2B+19+%3C+16+\"
\n" ); document.write( "\"+15.2+%3C+16+\" passes
\n" ); document.write( "OK
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