document.write( "Question 697749: If 1000 kids averaged 80% on a test how many more 100% scores would a school need to increase the average to 85%?\r
\n" ); document.write( "\n" ); document.write( "I need to make this into a formula. Thank you \n" ); document.write( "

Algebra.Com's Answer #430260 by reviewermath(1029) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"%2880%281000%29+%2B+100x%29%2F%281000+%2B+x%29+=+85\"$ , multiply by 1000 + x
\n" ); document.write( " $\"%2880%281000%29+%2B+100x%29+=+85000+%2B+85x\"$
\n" ); document.write( " $\"100x-+85x+=+85000+-+80000\"$
\n" ); document.write( " $\"15x+=+5000\"$
\n" ); document.write( " $\"x+=+333.33\"$
\n" ); document.write( "Answer: 334
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