When p2 – 4p is subtracted from p2 + p – 6, the result is 5p-6 to get p – 9, subtract

is what is asked.

So all you need to do is a value that will result to p - 9.

x =   To isolate x we just transpose the values from the other side of the equation and do the opposite operation. 

Combine like terms and just copy the terms that do not have similar expressions:

p will cancel out because p - p = 0
-6 and + 9  will come together because they are like terms: -6 + 9 = 3 
does not have a pair so it will remain as is. you will be left with:



Let us check:

   
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