document.write( "Question 71736This question is from textbook Saxon Algebra 1
\n" ); document.write( ": Use elimination to solve:
\n" ); document.write( "x+3y=16
\n" ); document.write( "2x-y=4\r
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\n" ); document.write( "\n" ); document.write( "How do I find what x or y is equal to? \n" ); document.write( "
Algebra.Com's Answer #51289 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
Use elimination to solve:
\n" ); document.write( "L1 x+3y=16
\n" ); document.write( "L2 2x-y=4
\n" ); document.write( "Multiply L2 by 3 so that when you add L1+L2 the y's cancel so that you can solve for x.
\n" ); document.write( "L2 3(2x-y)=3(4) ---> 6x-3y=12
\n" ); document.write( "Now add this to L1:
\n" ); document.write( " x+3y=16
\n" ); document.write( "6x-3y=12
\n" ); document.write( "_________
\n" ); document.write( "7x+0=28
\n" ); document.write( "7x=28
\n" ); document.write( "7x/7=28/7
\n" ); document.write( "x=4
\n" ); document.write( "Now substitute 4 in for x in either L1 or L2 and solve for y, I'm going with L1:
\n" ); document.write( "(4)+3y=16
\n" ); document.write( "4+3y=16
\n" ); document.write( "4-4+3y=16-4
\n" ); document.write( "3y=12
\n" ); document.write( "3y/3=12/3
\n" ); document.write( "y=4
\n" ); document.write( "The solution (x,y) is (4,4)
\n" ); document.write( "Happy Calculating!!!\r
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