document.write( "Question 81760: please help.
\n" ); document.write( "solve the system by substitution.\r
\n" ); document.write( "\n" ); document.write( "5x+4y=-2
\n" ); document.write( "y=4x+10\r
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\n" ); document.write( "\n" ); document.write( "20x-4y=-8
\n" ); document.write( "y=2+5x \n" ); document.write( "
Algebra.Com's Answer #58584 by rapaljer(4671)\"\" \"About 
You can put this solution on YOUR website!
5x+4y=-2
\n" ); document.write( "y=4x+10 \r
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\n" ); document.write( "\n" ); document.write( "5x+4y = -2
\n" ); document.write( "5x+4(4x+10) = -2
\n" ); document.write( "5x+16x + 40=-2
\n" ); document.write( "21x =-2-40
\n" ); document.write( "21x=-42
\n" ); document.write( "x=-2\r
\n" ); document.write( "\n" ); document.write( "y=4x+10
\n" ); document.write( "y=4(-2)+10
\n" ); document.write( "y=-8+10
\n" ); document.write( "y=2\r
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\n" ); document.write( "\n" ); document.write( "Check in the other equation:
\n" ); document.write( "5x+4y=-2
\n" ); document.write( "5(-2)+4(2)=-2
\n" ); document.write( "-10+8=-2 It checks!!\r
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\n" ); document.write( "\n" ); document.write( "Now, you solve your other problem just like this one!!\r
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\n" ); document.write( "\n" ); document.write( "R^2 at SCC
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