document.write( "Question 1176765: Solve by Substitution {𝑦=3𝑥+2;2𝑥+𝑦=−8 \n" ); document.write( "

Algebra.Com's Answer #804245 by ikleyn(53751) $\"\"$ $\"About$

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document.write( "You just have \"y\" expressed via \"x\" in the first equation.\r\n" );
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document.write( "So, substitute this expression of \"y\" into the second equation, re[placing \"y\" there.\r\n" );
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document.write( "You will get\r\n" );
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document.write( "    2x + (3x + 2) = -8\r\n" );
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document.write( "      5x          = -8 - 2\r\n" );
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document.write( "      5x          = - 10\r\n" );
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document.write( "       x          = -10/5 = -2.\r\n" );
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document.write( "ANSWER.  x= -2;  y = 3x + 2 = 3*(-2) + 2 = -6 + 2 = -4.\r\n" );
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