Celsius degrees

The temperature on Monday was 5 celsius. The temperature on Thursday was 7 degrees less than the temperature on Monday. What was the temperature on Thursday?

Correct result:

t₂ =  -2 °C

Solution:

$$\begin{gathered} t_1=5^{\circ }\text{C } \\ {t}_2=t_1-7=5-7=-2^{\circ }\text{C} \end{gathered}$$

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