Question 83565
<pre>

 8.75a + 4.75p =  520
-4.75a - 4.75p = -380
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    4a         =  140


Your error was that you had 4.75a where you should
have only had 4a. Note that 8.75-4.75 = 4, not 4.75.


 Answer a = 35, p = 45

Edwin</pre>