document.write( "Question 237112: please help me solve this equation.
\n" ); document.write( "i have to use substitution or elimination to solve each system or equations.\r
\n" ); document.write( "\n" ); document.write( "9x+2y=5
\n" ); document.write( "3x-y=-10 \n" ); document.write( "
Algebra.Com's Answer #174387 by HeyEv(4)\"\" \"About 
You can put this solution on YOUR website!
I am going to use elimination, because it seems faster for this problem.
\n" ); document.write( "I want to get rid of Y. We already have a 2y, so to get -2y we are going to multiply the second system by 2
\n" ); document.write( "9x+2y=5
\n" ); document.write( "2(3x-y=-10)
\n" ); document.write( "_________
\n" ); document.write( "9x+2y=5
\n" ); document.write( "6x-2y=-20
\n" ); document.write( "__________
\n" ); document.write( "Next, we add and eliminate;
\n" ); document.write( "15x=-15
\n" ); document.write( "x= -1
\n" ); document.write( "_____
\n" ); document.write( "Now, we plug it in.
\n" ); document.write( "9*(-1)+2y=5
\n" ); document.write( "-9+2y=5
\n" ); document.write( "2y=14
\n" ); document.write( "y=7\r
\n" ); document.write( "\n" ); document.write( "and we check!
\n" ); document.write( "9x+2y=5
\n" ); document.write( "9(-1)+2(7)=5
\n" ); document.write( "-9+14=5
\n" ); document.write( "5=5,CORRECT!
\n" ); document.write( "_________
\n" ); document.write( "3x-y=-10
\n" ); document.write( "3(-1)-(7)=-10
\n" ); document.write( "-3-7=-10
\n" ); document.write( "-10=-10, CORRECT!\r
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