document.write( "Question 476435: 4x + y = 15
\n" ); document.write( "2x + 5y = 21
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #326777 by mananth(16946) $\"\"$ $\"About$

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4 x + 1 y = 15 .............1
\n" ); document.write( "2 x + 5 y = 21 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by -5
\n" ); document.write( "Multiply (2) by 1
\n" ); document.write( "-20 x -5 y = -75
\n" ); document.write( "2 x + 5 y = 21
\n" ); document.write( "Add the two equations
\n" ); document.write( "-18 x = -54
\n" ); document.write( "/ -18
\n" ); document.write( "x = 3
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "4 x + 1 y = 15
\n" ); document.write( "12 + 1 y = 15
\n" ); document.write( " 1 y = 15 -12
\n" ); document.write( " 1 y = 3
\n" ); document.write( " y = 3
\n" ); document.write( " \n" ); document.write( "

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