document.write( "Question 1004193: Alexis has taken 3 exams and her average is currently X. On the fourth exam, she scored 20 points higher than her average (so she scored X + 20). How many points did her average increase by after this fourth exam? \n" ); document.write( "
Algebra.Com's Answer #620715 by Boreal(15235)\"\" \"About 
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average=total/n
\n" ); document.write( "x*3=total
\n" ); document.write( "fourth test scores (x+20)
\n" ); document.write( "new total is 3x+(x+20)=4x+20
\n" ); document.write( "Divided by 4, the new n
\n" ); document.write( "the average is x+5. Her average increased by 5.
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