document.write( "Question 627252: Twenty children were sharing equally the cost of a present for their teacher.When four of the children decided not to contribute, each of the other children had to pay 1.50 more.How much did the present cost, in Naira? \n" ); document.write( "

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Twenty children were sharing equally the cost of a present for their teacher.
\n" ); document.write( "When four of the children decided not to contribute, each of the other children had to pay 1.50 more.
\n" ); document.write( "How much did the present cost, in Naira?
\n" ); document.write( ":
\n" ); document.write( "let p = cost of the present
\n" ); document.write( "then
\n" ); document.write( " $\"p%2F20\"$ = original cost per student
\n" ); document.write( "and
\n" ); document.write( " $\"p%2F16\"$ = subsequent cost per student (4 students opted out)
\n" ); document.write( ":
\n" ); document.write( "Actual cost - original cost = 1.50
\n" ); document.write( " $\"p%2F16\"$ - $\"p%2F20\"$ = 1.50
\n" ); document.write( "multiplying by 80 will get rid of the denominators
\n" ); document.write( "80* $\"p%2F16\"$ - 80* $\"p%2F20\"$ = 80(1.50)
\n" ); document.write( "cancel out the denominators and you have
\n" ); document.write( "5p - 4p = 120
\n" ); document.write( "p = $120 is the cost of the present
\n" ); document.write( ";
\n" ); document.write( ":
\n" ); document.write( "Check this
\n" ); document.write( "120/16 = 7.50
\n" ); document.write( "120/20 = 6.00
\n" ); document.write( "--------------
\n" ); document.write( "differ: 1.50
\n" ); document.write( ":
\n" ); document.write( "What does \"in Naira\" mean? \n" ); document.write( "

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