Question 1186535
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Let x be the number of pupils in the class.


Write an equation for x as you read the problem


    {{{x/4}}} - {{{x/6}}} = 3.


To solve it, multiply both sides by 12. You will get


    3x - 2x = 3*12

       x    = 36.


<U>ANSWER</U>.  There are 36 pupils in the class.
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Solved.


The engine of the solution are these key words &nbsp;" Write an equation as you read the problem ".