The final expression is 
Step-by-step explanation:
The expression that we have is

In order to solve the expression, we start by applying the distributive property to the bracket. We get:

Simplifying,

Now we add the two terms in x, and we find:

Which is the final expression.
Learn more about expressions:
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I'm guessing this is what the question is asking?
If there are 3 strikes per 10, there should be 9 strikes per 30.
So there are 30 chips in the bag.