document.write( "Question 550740: I need help please!!!!\r
\n" ); document.write( "\n" ); document.write( "Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this -x + 4y = 0.5 -3x – 6y = 10.5 \n" ); document.write( "
Algebra.Com's Answer #359043 by ankor@dixie-net.com(22740)\"\" \"About 
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-x + 4y = 0.5
\n" ); document.write( "-3x – 6y = 10.5
\n" ); document.write( ":
\n" ); document.write( "Multiply the 1st equation by -30, the 2nd equation by 10,
\n" ); document.write( "this gets rid of the decimals and sets it up for elimination
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\n" ); document.write( "+30x - 120y = -15
\n" ); document.write( "-30x - 60y = 105
\n" ); document.write( "-----------------------adding eliminates x, find y
\n" ); document.write( "-180y = 90
\n" ); document.write( "y = \"90%2F%28-180%29\"
\n" ); document.write( "y = -.5
\n" ); document.write( ":
\n" ); document.write( "Find x, replace y with -.5 in the 2nd original equation
\n" ); document.write( "-3x – 6y = 10.5
\n" ); document.write( "-3x – 6(-.5) = 10.5
\n" ); document.write( "-3x + 3 = 10.5
\n" ); document.write( "-3x = 10.5 - 3
\n" ); document.write( "-3x = 7.5
\n" ); document.write( "x = \"7.5%2F%28-3%29\"
\n" ); document.write( "x = -2.5
\n" ); document.write( ":
\n" ); document.write( "see if these two values x=-.5 and y=-2.5 check out in the 1st equation
\n" ); document.write( "-x + 4y = 0.5
\n" ); document.write( "-(-2.5) + 4(-.5) = .5
\n" ); document.write( "2.5 - 2 = .5 confirms our solution \n" ); document.write( "
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