SOLUTION: Kate and Beth shelf books in a library. One day, with 86 books to shelve, Kate did some and Beth did 10 more than Kate. At this point, Beth said, there are as many books left to sh

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Question 669859: Kate and Beth shelf books in a library. One day, with 86 books to shelve, Kate did some and Beth did 10 more than Kate. At this point, Beth said, there are as many books left to shelf as I've already done." How many books had Beth shelved.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Kate shelved +x+ books
Beth shelved +x+%2B+10+
given:
+86+=+x+%2B+x+%2B+10+%2B+%28+x+%2B+10+%29+
+86+=+3x+%2B+20+
+3x+=+86+-+20+
+3x+=+66+
+x+=+22+
+x+%2B+10+=+32+
Beth shelved 32 books