document.write( "Question 461843: Use the elimination method. What is the solution to the linear system 15x + 5y=185 and -4x+5y=-5 \n" ); document.write( "
Algebra.Com's Answer #316647 by MathLover1(20849)\"\" \"About 
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\r
\n" ); document.write( "\n" ); document.write( "\"15x+%2B+5y=185\"......1
\n" ); document.write( "\"-4x%2B5y=-5\" .........2....subtract from 1
\n" ); document.write( "---------------------------\r
\n" ); document.write( "\n" ); document.write( "\"15x+%2B+5y=185\"......1
\n" ); document.write( "-
\n" ); document.write( "\"-4x%2B5y=-5\" .........2
\n" ); document.write( "-----------------------------------\r
\n" ); document.write( "\n" ); document.write( "\"15x-%28-4x%29%2B+5y-+5y=185-%28-5%29\"\r
\n" ); document.write( "\n" ); document.write( "\"15x-%28-4x%29%2B+cross%285y%29-+cross%285y%29=185-%28-5%29\"\r
\n" ); document.write( "\n" ); document.write( "\"15x%2B4x+=185%2B5\"\r
\n" ); document.write( "\n" ); document.write( "\"19x+=190\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=190%2F19\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=10\"\r
\n" ); document.write( "\n" ); document.write( "now find \"y\"\r
\n" ); document.write( "\n" ); document.write( "\"15x+%2B+5y=185\"......1 \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"15%2A10+%2B+5y=185\"\r
\n" ); document.write( "\n" ); document.write( "\"150+%2B+5y=185\"\r
\n" ); document.write( "\n" ); document.write( "\"+5y=185-150\"\r
\n" ); document.write( "\n" ); document.write( "\"+5y=35\"\r
\n" ); document.write( "\n" ); document.write( "\"+y=35%2F5\"\r
\n" ); document.write( "\n" ); document.write( "\"+y=7\"\r
\n" ); document.write( "\n" ); document.write( "check:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"15x+%2B+5y=185\"......1 \r
\n" ); document.write( "\n" ); document.write( "\"15%2A10+%2B+5%2A7=185\" \r
\n" ); document.write( "\n" ); document.write( "\"150+%2B+35=185\" \r
\n" ); document.write( "\n" ); document.write( "\"185=185\" \r
\n" ); document.write( "\n" ); document.write( "\"-4x%2B5y=-5\" .........2\r
\n" ); document.write( "\n" ); document.write( "\"-4%2A10%2B5%2A7=-5\" \r
\n" ); document.write( "\n" ); document.write( "\"-40%2B35=-5\" \r
\n" ); document.write( "\n" ); document.write( "\"-5=-5\" \r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );