document.write( "Question 1084161: Jay can buy a stereo either online or at a local store if he buys online he gets a 15% discount but he has to pay a $12 shipping fee at the local store the cereal is not on sale but there is no shipping fee for what regular price is it cheaper for Jay to buy a stereo online \n" ); document.write( "

Algebra.Com's Answer #698320 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = the regular price
\n" ); document.write( "For buying online:
\n" ); document.write( " $\"+x+-+.15x+%2B+12+\"$
\n" ); document.write( " $\"+.85x+%2B+12+\"$
\n" ); document.write( "----------------
\n" ); document.write( "For what value of $\"+x+\"$ is
\n" ); document.write( "buying online cheaper?
\n" ); document.write( " $\"+.85x+%2B+12+%3C+x+\"$
\n" ); document.write( "subtract $\"+.85x+\"$ from both sides
\n" ); document.write( " $\"+12+%3C+.15x+\"$
\n" ); document.write( " $\"+80+%3C+x+\"$
\n" ); document.write( "-------------
\n" ); document.write( "When the regular price is greater than $80
\n" ); document.write( "it is cheaper to buy online
\n" ); document.write( "---------------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+x+=+80+\"$
\n" ); document.write( "Online price=
\n" ); document.write( " $\"+.85x+%2B+12+=+.85%2A80+%2B+12+\"$
\n" ); document.write( " $\"+.85x+%2B+12+=+68+%2B+12+\"$
\n" ); document.write( " $\"+.85x+%2B+12+=+80+\"$
\n" ); document.write( "------------------------------
\n" ); document.write( " $\"+x+=+81+\"$
\n" ); document.write( " $\"+.85x+%2B+12+=+.85%2A81+%2B+12+\"$
\n" ); document.write( " $\"+.85x+%2B+12+=+68.85+%2B+12+\"$
\n" ); document.write( " $\"+.85x+%2B+12+=+80.85+\"$
\n" ); document.write( "So, when the regular price is $81, the
\n" ); document.write( "online price is $80.85
\n" ); document.write( "OK \n" ); document.write( "

\n" );