SOLUTION: A book costs $3. Mr. Grayson spent $81 on books. The number of books, b, can be found by solving the equation 3b = 81. Which is the best method for solving the equation?

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Question 885259: A book costs $3. Mr. Grayson spent $81 on books. The number of books, b, can be found by solving the equation 3b = 81. Which is the best method for solving the equation?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Divide both sides by 3 to get


3b = 81

3b/3 = 81/3

b = 27


So Mr Grayson bought 27 books