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Answer:
130+8n
Step-by-step explanation:
We know that all four humidifiers cost $520 to buy at first. So, we divide that by four to get the cost of one humidifer. $130.
We know that it costs $32 a week to keep all four humidifiers maintained. So, we divide that by four to get the cost of keeping one humidifier maintained. $8 per week.
130+8n is the equation that represents the cost of buying and maintaining one humidifier.