Bounce Parties charges $20 per hour plus $80 for an inflatable rental. Jump Jump Bounce charges $30 per hour plus $30 for an inflatable rental. At a certain point, both of the companies cost the same for the same amount of hours. How many hours of rental will both companies cost the same? and how much will it cost?

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step-by-step explanation:

given the equation is 8+9z=-6, the first step would be to subtract the 8 from both sides:

8+9z-8=-6-8

since 8 minus 8 = 0, this would cancel out the 8. and since -6 minus 8 equals -14, the equation would look like this

9z = -14

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