document.write( "Question 302875: Solve each system of equations by the substitution method.\r
\n" ); document.write( "\n" ); document.write( "1) y=3x
\n" ); document.write( " 5x+2y=44\r
\n" ); document.write( "\n" ); document.write( "2)x=5y-1
\n" ); document.write( " x+2y=13\r
\n" ); document.write( "\n" ); document.write( "3)y=2x+7
\n" ); document.write( " 3x-y=-9\r
\n" ); document.write( "\n" ); document.write( "4)-2x+3y=11
\n" ); document.write( " x=4y-3\r
\n" ); document.write( "\n" ); document.write( "5)y=6x-5
\n" ); document.write( " y=-x+9\r
\n" ); document.write( "\n" ); document.write( "6) -3x+y=7
\n" ); document.write( " 5x+2y=3 \n" ); document.write( "

Algebra.Com's Answer #217158 by Alan3354(69443) $\"\"$ $\"About$

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6) -3x+y=7
\n" ); document.write( "5x+2y=3
\n" ); document.write( "------------
\n" ); document.write( "The first 5 have one equation with one of the variables in terms of the other, so the substitution is obvious.
\n" ); document.write( "In #6, solve eqn 1 for y, then sub into eqn 2.
\n" ); document.write( "6) -3x+y=7
\n" ); document.write( "y = 3x+7
\n" ); document.write( "----------
\n" ); document.write( "5x + 2(3x+7) = 3
\n" ); document.write( "5x + 6x+14 = 3
\n" ); document.write( "11x + 14 = 3
\n" ); document.write( "11x = -11
\n" ); document.write( "You can do the rest.
\n" ); document.write( " \n" ); document.write( "

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