document.write( "Question 647220: venus is 31.2 million mi farther from the sun than mercury, while earth is 57 million mi farther from the sun than mercury. if the total of the distances from these planets is 196.2 million mi, how far away from the sun is mercury? \n" ); document.write( "
Algebra.Com's Answer #406077 by colliefan(242)\"\" \"About 
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Call the distance between sun and mercury x. Then:\r
\n" ); document.write( "\n" ); document.write( "Distances:
\n" ); document.write( "sun to mercury: x
\n" ); document.write( "sun to venus: x+31.2
\n" ); document.write( "sun to earth: x+57\r
\n" ); document.write( "\n" ); document.write( "Added all together, they equal 196.2 mi so:\r
\n" ); document.write( "\n" ); document.write( "x + x+31.2+x+57=196.2
\n" ); document.write( "3x+88.2=196.2
\n" ); document.write( "3x=108 mi
\n" ); document.write( "x = 36 mi\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Substitute this value back into the original equation to make sure it is correct.
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