Question 1199462
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A machine requires 6 hours to make a unit of Product A and 5 hours to make a unit of Product B. 
Last month the machine operated for 481 hours, producing a total of 89 units. 
How many units of Product A were produced?
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            It can be solved using two equations in two unknown, or one equation in one unknown.


            I will show you the last way.



<pre>
Let x be the number of units of A-product.
Then the number of units of B-product is 89-x.


Write the full elapsed time equation

    6x + 5*(89-x) = 481.


Simplify and find x

    6x + 445 - 5x = 481

    6x - 5x = 481 - 445

       x    = 36.


<U>ANSWER</U>.  36 units of A-product were produced.


<U>CHECK</U>.  6*36 + 5*(89-36) = 6*36 + 5*53 = 216 + 265 = 481 hours, total time.  ! correct !
</pre>

Solved.


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Be attentive: in his solution, tutor @greenestamps mixed up products A and B 
and gave you wrong answer.