The manager of an apartment building needs an electrician to repair the power generator for the building. The table below shows the fixed amount for a time service call and hourly charges for two different companies.

For what number of hours,x, will the total cost of repairing the generator for company B be less than or equal to the total cost of repairing the generator for company A?

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Company A B Fixed amount for a service call $40 $75 Hourly Rate $55 $48