document.write( "Question 82404: Solve the system by substitution.
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document.write( " 2x + 2y = 14
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document.write( " y = –3x + 9\r
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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)![]() ![]() ![]() 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 \n" ); document.write( " |