document.write( "Question 420142: Solve the system of equations by substitution.
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document.write( "3x + y = 13
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document.write( "2x - 7y = 24
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Algebra.Com's Answer #293632 by robertb(5830)![]() ![]() You can put this solution on YOUR website! From the top equation, y = 13 - 3x. Then\r \n" ); document.write( "\n" ); document.write( "2x - 7(13 - 3x) = 24 \n" ); document.write( "==> 2x - 91 + 21x = 24 \n" ); document.write( "==> 23x = 115 \n" ); document.write( "==> x = 5. \n" ); document.write( "==> y = 13 - 3*5 = 13 - 15 = -2. \n" ); document.write( " |