document.write( "Question 1013857: Sum of ages of pupils is x.10 years later x+400.find number of pupils. \n" ); document.write( "
Algebra.Com's Answer #630144 by ikleyn(52788)\"\" \"About 
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\n" ); document.write( "Each contributes 10 to 400.\r
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\n" ); document.write( "\n" ); document.write( "The number is \"400%2F10\" = 40.\r
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