document.write( "Question 1094192: The selling price of $420 is 3 times the cost less $30, what is the cost \n" ); document.write( "
Algebra.Com's Answer #708814 by Gentle Phill(18)\"\" \"About 
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Given that:
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\n" ); document.write( "S.P = $420 = 3C.P + $30
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\n" ); document.write( "Where S.P is the selling price and C.P is the cost price.
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\n" ); document.write( "3C.P = $420 - $30
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\n" ); document.write( "3C.P = $390
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\n" ); document.write( "C.P = $390/3
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\n" ); document.write( "C.P = $130
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\n" ); document.write( "Your friend,
\n" ); document.write( "Francis. \n" ); document.write( "
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