document.write( "Question 82404: Solve the system by substitution.
\n" ); document.write( " 2x + 2y = 14
\n" ); document.write( " y = –3x + 9\r
\n" ); document.write( "\n" ); document.write( "Hint: You must find both the x and the y values for full credit.\r
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Algebra.Com's Answer #59250 by checkley75(3666)\"\" \"About 
You can put this solution on YOUR website!
y=-3x+9 now substitute (-3x+9) for y in the other equation & solve for x.
\n" ); document.write( "2x+2(-3x+9)=14
\n" ); document.write( "2x-6x+18=14
\n" ); document.write( "-4x=14-18
\n" ); document.write( "-4x=-4
\n" ); document.write( "x=-4/-4
\n" ); document.write( "x=1 answer.
\n" ); document.write( "y=-3*1+9
\n" ); document.write( "y=-3+9
\n" ); document.write( "y=6 answer.
\n" ); document.write( "proof
\n" ); document.write( "6=-3*1+9
\n" ); document.write( "6=-3+9
\n" ); document.write( "6=6
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