Final answer:
An algebraic expression for the given situation is 200 + 50x, where x represents the number of hours of repair service provided.
Step-by-step explanation:
An algebraic expression that models the given situation can be represented as:
200 + 50x
where 'x' represents the number of hours of repair service provided.
For example, if the repair service provider spends 3 hours on repairing, the total cost for the service would be:
200 + 50(3) = 200 + 150 = 350
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