document.write( "Question 628512: find the solution x+6y=23 x-y=-5 \n" ); document.write( "

Algebra.Com's Answer #395676 by Maths68(1474) $\"\"$ $\"About$

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x+6y=23..........(1)
\n" ); document.write( "x-y=-5...........(2)\r
\n" ); document.write( "\n" ); document.write( "Take (2)
\n" ); document.write( "x-y=-5
\n" ); document.write( "x=y-5............(3)
\n" ); document.write( "Put the value of x from (3) to (1) \r
\n" ); document.write( "\n" ); document.write( "(y-5)+6y=23
\n" ); document.write( "y-5+6y=23
\n" ); document.write( "7y=23+5
\n" ); document.write( "7y=28
\n" ); document.write( "Divide by 7 both sides
\n" ); document.write( "7y/7=28/7
\n" ); document.write( "y=4
\n" ); document.write( "Put the value of y in (3)\r
\n" ); document.write( "\n" ); document.write( "x=y-5............(3)
\n" ); document.write( "x=4-5
\n" ); document.write( "x=-1\r
\n" ); document.write( "\n" ); document.write( "x,y=-1,4\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Check
\n" ); document.write( "======
\n" ); document.write( "Put the values of x and y in (1)\r
\n" ); document.write( "\n" ); document.write( "x+6y=23..........(1)
\n" ); document.write( "-1+6(4)=23
\n" ); document.write( "-1+24=23
\n" ); document.write( "23=23\r
\n" ); document.write( "\n" ); document.write( "Put the values of x and y in (1)
\n" ); document.write( "x-y=-5...........(2)
\n" ); document.write( "-1-4=-5
\n" ); document.write( "-5=-5
\n" ); document.write( " \n" ); document.write( "

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