document.write( "Question 1096412: solve system by elimimination\r
\n" ); document.write( "\n" ); document.write( "3x-5y=1\r
\n" ); document.write( "\n" ); document.write( "9x-y=-17 \n" ); document.write( "
Algebra.Com's Answer #710813 by addingup(3677)\"\" \"About 
You can put this solution on YOUR website!
3x-5y=1 multiply all sides times -3 and add to the other equation:
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\n" ); document.write( "9x-y=-17
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\n" ); document.write( "-9x+15y = -3
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\n" ); document.write( "0x+14y = -20
\n" ); document.write( "14y = -20
\n" ); document.write( "y = -20/14 = -10/7
\n" ); document.write( "We now have y, let's find x:
\n" ); document.write( "9x−y=−17
\n" ); document.write( "9x-(-10/7) = -17
\n" ); document.write( "9x+10/7 = -17
\n" ); document.write( "9x = -17-10/7
\n" ); document.write( "9x = -129/7
\n" ); document.write( "x = (-129/7)/9 = (-129*1)/(7*9) = -43/21
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\n" ); document.write( "Answer:
\n" ); document.write( "y = -10/7
\n" ); document.write( "x = -43/21
\n" ); document.write( "if you need to check the answers, substitute in the equations for x and y, I'll do one for an example:
\n" ); document.write( "3x-5y=1
\n" ); document.write( "3(-43/21)-5(-10/7) = 1
\n" ); document.write( "-43/7+50/7 = 7/7 = 1 Correct.
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