document.write( "Question 1209242: -2x+y=-15 and 2x+3y=-15
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Algebra.Com's Answer #847900 by math_tutor2020(3817)\"\" \"About 
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\n" ); document.write( "-2x+y = -15
\n" ); document.write( "2x+3y = -15\r
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\n" ); document.write( "\n" ); document.write( "Add straight down
\n" ); document.write( "The x terms go away since they add to 0x or simply 0.
\n" ); document.write( "The y terms add to 4y
\n" ); document.write( "The right hand sides add to -30\r
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\n" ); document.write( "\n" ); document.write( "4y = -30 leads to y = -30/4 = -15/2 = -7.5\r
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\n" ); document.write( "\n" ); document.write( "Then use this value of y in either equation to find x.
\n" ); document.write( "-2x+y = -15
\n" ); document.write( "-2x-7.5 = -15
\n" ); document.write( "-2x = -15+7.5
\n" ); document.write( "-2x = -7.5
\n" ); document.write( "x = -7.5/(-2)
\n" ); document.write( "x = 3.75
\n" ); document.write( "x = 3 + (3/4)
\n" ); document.write( "x = (12/4) + (3/4)
\n" ); document.write( "x = (12+3)/4
\n" ); document.write( "x = 15/4\r
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\n" ); document.write( "\n" ); document.write( "When stating the solution in fraction form it would be (x,y) = (15/4, -15/2)\r
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\n" ); document.write( "\n" ); document.write( "The decimal equivalent is (x,y) = (3.75, -7.5)
\n" ); document.write( "Each decimal value is exact and hasn't been rounded.\r
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\n" ); document.write( "\n" ); document.write( "I'll let the student verify this solution.
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