document.write( "Question 479612: If a + b = 3 and 2b + c = 2, then 2a - c = ?\r
\n" ); document.write( "\n" ); document.write( "a) -4
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\n" ); document.write( "d) 4
\n" ); document.write( "e) 5\r
\n" ); document.write( "\n" ); document.write( "Again and again thanks for helping! wonderful website and tutors :-) \n" ); document.write( "

Algebra.Com's Answer #328590 by Edwin McCravy(20059) $\"\"$ $\"About$

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a + b = 3 and 2b + c = 2, then 2a - c = ?\r
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document.write( "a + b = 3\r\n" );
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document.write( "Add -a to both sides:\r\n" );
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document.write( "    b = 3 - a\r\n" );
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document.write( "Substitute (3 - a) for b in the second equation: \r\n" );
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document.write( "       2b + c = 2\r\n" );
document.write( " 2(3 - a) + c = 2\r\n" );
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document.write( "Use the distributive principle to remove the parentheses:\r\n" );
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document.write( "   6 - 2a + c = 2\r\n" );
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document.write( "Add -6 to both sides:\r\n" );
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document.write( "      -2a + c = -4\r\n" );
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document.write( "Multiply both sides by -1:\r\n" );
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document.write( "  -1(-2a + c) = -1(-4)\r\n" );
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document.write( "Use the distributive principle to remove the parentheses:\r\n" );
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document.write( "       2a - c = 4 \r\n" );
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document.write( "Choice d.\r\n" );
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document.write( "Edwin

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