document.write( "Question 123547: Solve the system by substitution.
\n" ); document.write( " x + 2y = –17
\n" ); document.write( " –2x + 3y = –15
\n" ); document.write( "Solve the system by addition.
\n" ); document.write( " –2x + 5y = –19
\n" ); document.write( " x – 3y = 10
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Algebra.Com's Answer #90629 by rajagopalan(174)\"\" \"About 
You can put this solution on YOUR website!
x + 2y = –17
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Solved by pluggable solver: Linear System solver (using determinant)
Solve:
\n" ); document.write( " \"+system%28+%0D%0A++++1%5Cx+%2B+2%5Cy+=+-17%2C%0D%0A++++-2%5Cx+%2B+3%5Cy+=+-15+%29%0D%0A++\"
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\n" ); document.write( " Any system of equations:
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\n" ); document.write( " (x=-3, y=-7}
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