Question 1114775
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<pre>
20p + 8r = 32   dollars.


Divide by 4 both sides:


5p + 2r = 8   dollars.


Multiply by 5 both sides:


25p + 10r = 40  dollars.


<U>Answer</U>.  25 pens and 10 rulers cost 40 dollars.
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Solved.


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<U>The lesson to learn from this solution</U>:


<pre>
    You do not need solving the system of equations in this case.

    You  simply need to multiply the given data by the factor of  {{{5/4}}}.

    That is ALL the problem wants of you.
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