suppose that a kitchen appliance company\'s monthy sales and advertising expense

Question

suppose that a kitchen appliance company's monthy sales and advertising expenses are approximately related by the equation xy-6x+20y=0, where x is thousands of dollars spent on advertising and y is thousands of dishwashers sold. Currently the company is spending 10 thousand dollars on advertising and is selling 2 thousand dishwashers each month. If the compant plans to increase monthly advertising expenditures at the rate of 1.5 thousand dollars per month, how fast will sales rise?

I already did the implicit differentiation, I just need help knowing what to plug in to get the number of dish washers.

Explanation / Answer

1/5 dishwasher/month(sales will rise by 20%)

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