document.write( "Question 447905: substitution
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Algebra.Com's Answer #853340 by ikleyn(53538) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "        The solution in the post by @mananth is INCORRECT.\r
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\n" ); document.write( "\n" ); document.write( "        His answer a = 1.08, b = 0.23 is INCORRECT.   These values do not satisfy second equation.\r
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\n" ); document.write( "\n" ); document.write( "        So, I came to solve the problem in a right way.\r
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document.write( "From first equation, express  a = 4b+2 and substitute it into the second equation\r\n" );
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document.write( "    2(4b+2) - 5b = 1,\r\n" );
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document.write( "    8b + 4 - 5b = 1,\r\n" );
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document.write( "    3b = 1 - 4 = -3,\r\n" );
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document.write( "     b = -3/3 = -1.\r\n" );
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document.write( "Then  a = 4b+2 = 4*(-1) + 2 = -2.\r\n" );
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document.write( "ANSWER.  The solution is  a = -2,  b = -1.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved correctly.\r
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