document.write( "Question 105517: Which equation is an identity?
\n" ); document.write( "a) 3w+6-w=4w-2(w-3)
\n" ); document.write( "b) 8-(5v+4)=-5v-4
\n" ); document.write( "c) 5y+7=5y-7
\n" ); document.write( "d) 4m-6=5m+9-m \n" ); document.write( "
Algebra.Com's Answer #76811 by ptaylor(2198)\"\" \"About 
You can put this solution on YOUR website!
The answer is a).\r
\n" ); document.write( "\n" ); document.write( "a)
\n" ); document.write( "3w+6-w=4w-2(w-3) get rid of parens
\n" ); document.write( "3w+6-w=4w-2w+6 collect like terms on each side of the equation
\n" ); document.write( "2w+6=2w+6---------------this is an identity---true for all values of w\r
\n" ); document.write( "\n" ); document.write( "b)
\n" ); document.write( "8-(5v+4)=-5v-4 get rid of parens
\n" ); document.write( "8-5v-4=-5v-4 collect like terms on each side of the equation
\n" ); document.write( "-5v+4=-5v-4
\n" ); document.write( "This problem does not have a solution. There are no values for v that will satisfy this equation.\r
\n" ); document.write( "\n" ); document.write( "c)
\n" ); document.write( "5y+7=5y-7
\n" ); document.write( "This problem does not have a solution. There are no values for y that will satisfy this equation. \r
\n" ); document.write( "\n" ); document.write( "d)
\n" ); document.write( "4m-6=5m+9-m collect like terms on each side of the equation
\n" ); document.write( "4m-6=4m+9
\n" ); document.write( "This problem does not have a solution. There are no values for m that will satisfy this equation. \r
\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor
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