document.write( "Question 181790: Use Substitutionto solve each euqations, If the system does not have exactly one solution, state whethter it has no solution or infinitely many solutions.
\n" ); document.write( "1/3X-Y=3 2X+Y=25 \n" ); document.write( "
Algebra.Com's Answer #136474 by Alan3354(69443)\"\" \"About 
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Use Substitutionto solve each euqations, If the system does not have exactly one solution, state whethter it has no solution or infinitely many solutions.
\n" ); document.write( "1/3X-Y=3 2X+Y=25
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\n" ); document.write( "1/3X-Y=3 --> x-3y = 9 --> x = 3y+9
\n" ); document.write( "2X+Y=25
\n" ); document.write( "Sub for x into 2nd eqn
\n" ); document.write( "2(3y+9) + y = 25
\n" ); document.write( "6y+18 + y = 25
\n" ); document.write( "7y = 7
\n" ); document.write( "y = 1
\n" ); document.write( "-------------
\n" ); document.write( "Sub for y into either eqn
\n" ); document.write( "2x + 1 = 25
\n" ); document.write( "2x = 24
\n" ); document.write( "x = 12\r
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