The table shows the price of a bluetooth speaker each month for 4 months
Month Price(dollar)
June 165
July 165+(-12)
August 165+2(-12)
September 165+3(-12)

The table at the right shows the amount of money you save each month. When do you have enough money saved to buy the speaker? Explain your reasoning.
Amount Saved
June $35
July $55
August $45
September $18

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Solution

Step 1: To find the month in which we can buy a speaker we need to find the cost of bluetooth speaker monthly and compare it with the amount saved.
Step 2: Price of bluetooth speaker monthly
June $= $ 165$
July $= 165 - 12 = $ 153$
August $= 153 - 12 = $ 141$
September $= 141 - 12 = $ 129$
Step 3: Amount saved monthly
June $= $ 35$
July $= 35 + 55 = $ 90$
August $= 90 + 45 = $ 135$
Final Answer: As the amount saved in September is more than the price of a bluetooth speaker in the same month.
Hence, we can buy bluetooth speaker in the month of September.

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Month	Price(dollar)
June	165
July	165+(-12)
August	165+2(-12)
September	165+3(-12)