document.write( "Question 60487: Instructions: Solve each system by the substitution method.\r
\n" ); document.write( "\n" ); document.write( "What is the solution for 5x+2y=-1
\n" ); document.write( " 2x-y=-13
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Algebra.Com's Answer #41565 by kayeith(17)\"\" \"About 
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5x + 2y = -1
\n" ); document.write( "2x - y = -13\r
\n" ); document.write( "\n" ); document.write( "a) - y = - 2x - 13
\n" ); document.write( " -1 (-y = - 2x - 13)
\n" ); document.write( " y = 2x + 13\r
\n" ); document.write( "\n" ); document.write( "b) 5x + 2 (2x + 13) = -1
\n" ); document.write( " 5x + 4x + 26 = -1
\n" ); document.write( " 9x = -1 - 26
\n" ); document.write( " 9x = -27
\n" ); document.write( " x = -27 / 9
\n" ); document.write( " x = -3\r
\n" ); document.write( "\n" ); document.write( "c) y = 2x + 13
\n" ); document.write( " y = 2 (-3) + 13
\n" ); document.write( " y = -6 + 13
\n" ); document.write( " y = 7
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