document.write( "Question 456666: I have to solve a system of equations using substitution to eliminate one variable for 4x+2y=6 and 2x+y=3. \n" ); document.write( "
Algebra.Com's Answer #313450 by lwsshak3(11628)\"\" \"About 
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I have to solve a system of equations using substitution to eliminate one variable for 4x+2y=6 and 2x+y=3
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\n" ); document.write( "2x+y=3
\n" ); document.write( "y=3-2x
\n" ); document.write( "..
\n" ); document.write( "4x+2y=6
\n" ); document.write( "sub for y
\n" ); document.write( "4x+2(3-2x)=6
\n" ); document.write( "4x+6-4x=6
\n" ); document.write( "0=0
\n" ); document.write( "..
\n" ); document.write( "In this case the lines coincide (same slope, same y-intercept)
\n" ); document.write( "Equations are dependent and system consistent
\n" ); document.write( "System has infinitely many solutions
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