SOLUTION: Mandie has enough sheets of paper to give each of her friends 3 sheets and has 31 sheets left over. Alternatively, she could give each friend 4 sheets and have 9 sheets left over.

Algebra ->  Average -> SOLUTION: Mandie has enough sheets of paper to give each of her friends 3 sheets and has 31 sheets left over. Alternatively, she could give each friend 4 sheets and have 9 sheets left over.       Log On


   



Question 1130507: Mandie has enough sheets of paper to give each of her friends 3 sheets and has 31 sheets left over. Alternatively, she could give each friend 4 sheets and have 9 sheets left over. How many sheets of paper does she have?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = the number of friends she has
+3x+%2B+31+=+4x+%2B+9+
+x+=+22+
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+3x+%2B+31+=+3%2A22+%2B+31+
+3x+%2B+31+=+97+
and, also
+4x+%2B+9+=+4%2A22+%2B+9+
+4x+%2B+9+=+97+
She has 97 sheets of paper