The temperature 4

The temperature was freezing, then doubled, dropped 10 degrees, and increased by 40 degrees. It is now 16 degrees. What was the starting temperature?

Final Answer:

t =  -7 °C

Step-by-step explanation:

$$\begin{gathered} t\cdot 2-10+40=16 \\ 2t=-14 \\ t=\frac{-14}{2}=-7 \\ t=-7=-7\text{°C} \end{gathered}$$

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