The temperature was very cold. Then the temperature doubled. Then the temperature dropped by 10 degrees. Then the temperature in
creased by 40 degrees. The temperature is now 16 degrees. What was the starting temperature?
2 answers:
Answer:
x: starting temperature
dropped 10
increase :40
total 16
x-10+40=16
x=-14
Step-by-step explanation:
Answer: the starting temperature is - 7 degrees.
Step-by-step explanation:
Let x represent the starting temperature.
Then the temperature doubled. It means that it became 2x degrees
Then the temperature dropped by 10 degrees. It means that it became 2x - 10 degrees.
Then the temperature increased by 40 degrees. It means that it became 2x - 10 + 40 = 2x + 30 degrees.
If the temperature is now 16 degrees, it means that
2x + 30 = 16
2x = 16 - 30
2x = - 14
x = - 14/2
x = - 7 degrees
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