Skylar repairs microwaves. Her revenue, in dollars, can be modeled by the equation \( y=80+30 x \), where \( x \) is the number of hours spent repairing microwaves. Her overhead cost, in dollars, can be modeled by the equation \( y=10 x^{2}-20 \), where \( x \) is the number of hours spent repairing microwaves.
After how many hours does she break even?
Note: The phrase break even refers to the value where the two functions are equivalent.
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\( \square \)