7. The difference between the squares of two consecutive numbers is 31. Find the numbers.
8. Find a number whose double is 45 greater than its half.
9. Find a number such that when 5 is subtracted from 5 times that number, the result is 4 more than twice the number.
10. Divide 184 into two parts such that one-third of one part may exceed one-seventh of another part by 8.
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