SOLUTION: The product of a number and 12 decreased by 13 is 611. Find the number. ( Show the solution)

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Question 1200069: The product of a number and 12 decreased by 13 is 611. Find the number. ( Show the solution)
Answer by ikleyn(52914) About Me  (Show Source):
You can put this solution on YOUR website!
.


                You can solve this problem using equation. 


Let x be the unknown number.

Write equation as you read the problem

    12x - 13 = 611.


Simplify and find x

    12x = 611 + 13

    12x = 624

      x = 624/12 = 52.


ANSWER.  x= 52.


CHECK.  12*52 - 13 = 611.    ! correct !

Solved.


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                You can solve it  MENTALLY  without using equations. 


For it, make the inverse arithmetic operations in reverse order:


    - First, add 13 to 611 mentally and get 624.

    - Next, divide 624 by 12.   You will get the same answer 52.

Completed.

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