document.write( "Question 1086603: Mary counted 15 cupcakes left from the whole batch that Mother made for the picnic. \"We've already eaten two-fifths,\" she shouted. How many cupcakes did Mother bake. I tried 15* 2/5 and came up with 6 eaten from the 15. I then added 6 to the 15 showing that 21 cupcakes were made. However, that seems to tell me that the two-fifths made be in error. I know that the unknown is the total amount of the cupcakes baked. Unclear as to how to find the unknown with a problem as 15 X 2/5=x or 15 + 2/5x=x. Thank you.
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Algebra.Com's Answer #700834 by MathTherapy(10552)\"\" \"About 
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Mary counted 15 cupcakes left from the whole batch that Mother made for the picnic. \"We've already eaten two-fifths,\" she shouted. How many cupcakes did Mother bake. I tried 15* 2/5 and came up with 6 eaten from the 15. I then added 6 to the 15 showing that 21 cupcakes were made. However, that seems to tell me that the two-fifths made be in error. I know that the unknown is the total amount of the cupcakes baked. Unclear as to how to find the unknown with a problem as 15 X 2/5=x or 15 + 2/5x=x. Thank you.
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No, no, no! It can't be done like that!
\n" ); document.write( "Since \"2%2F5\" was eaten, \"3%2F5\" of the total made, was left
\n" ); document.write( "This means that 15 represents \"3%2F5\" of the total number made.
\n" ); document.write( "With N being the number baked, this leads to the following PROPORTION: \"%283%2F5%29%2F1++=+15%2FN\"
\n" ); document.write( "\"matrix%281%2C3%2C+%283%2F5%29N%2C+%22=%22%2C+15%29\" ------- Cross-multiplying
\n" ); document.write( "Number baked, or \"highlight_green%28matrix%281%2C5%2C+N%2C+%22=%22%2C+5%2815%29%2F3%2C+or%2C+25%29%29\" \n" ); document.write( "
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