+176 Jacob, Kevin, and Miguel have sold a total of 328 books. Miguel sold 55 more books than Jacob. Kevin sold 42 fewer books than Jacob. How many books did Kevin sell?
+307 Really is the same as the other one you posted.....
Answer: Kevin sold 63 books.
Solution:
Let J be the number of books Jacob sold. Let K be the number of books Kevin sold. Let M be the number of books Miguel sold.
J + K + M = 328
M = J + 55
J = K + 42
Substition:
J + K + J + 55 = 328
3K + 139 = 328
3K = 189
K = 63
