To go on the class trip, Chang needs at least $125. He has saved $45, and he makes $7 an hour at his job. What is the minimum number of complete hours he must work to have enough money to go on the trip? (Assume there are no withholdings from his check.)

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well, subtract the savings from the minimum (unless of course he's to not want to spend his savings).

Then solve for 125-45=7h for h.

- What's the exact answer though ?

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