document.write( "Question 423173: Could someone please help me with 8th grade algebra? solve the linear system using substitution.
\n" ); document.write( " x=16-4y
\n" ); document.write( " 3x+4y=8
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #295228 by stanbon(75887)\"\" \"About 
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solve the linear system using substitution.
\n" ); document.write( "x=16-4y
\n" ); document.write( "3x+4y=8 \r
\n" ); document.write( "\n" ); document.write( "-----
\n" ); document.write( "The 1st equation tells you x = 16-4y
\n" ); document.write( "---
\n" ); document.write( "Substitute that into the 2nd equation
\n" ); document.write( "and solve for \"y\":
\n" ); document.write( "3(16-4y)+4y = 8
\n" ); document.write( "48 - 12y + 4y = 8
\n" ); document.write( "-8y = -40
\n" ); document.write( "---
\n" ); document.write( "y = 5
\n" ); document.write( "---
\n" ); document.write( "Solve for \"x\"
\n" ); document.write( "x = 16-4y
\n" ); document.write( "x = 16-4*5
\n" ); document.write( "x = 16-20
\n" ); document.write( "x = -4
\n" ); document.write( "----------
\n" ); document.write( "Solution: (-4,5)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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