Question 1119157
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This problem is for ONE unknown.


<pre>
Let x = #of $10 tickets.

Then the number of $20 tickets is (x+157).

Then the number of $30 tickets is the rest  3357 - x - (x+57) = 3300-2x.


The money equation is

10x + 20*(x+57) + 30*(3300-2x) = 64640.


Simplify and solve for x.
</pre>


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


<pre>
    This problem is for ONE unknown - not for three.


        This problem is for ONE unknown - not for three.


            This problem is for ONE unknown - not for three.
</pre>

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