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In about 12 hours in North Dakota the temperature rose from -33 degrees farenheit to 50 degrees farenheit. By how much did the temperature change?

Correct result:

t =  83 °F

Solution:

$$\begin{gathered} t_1=-33^{\circ }\text{F } \\ {t}_2=50^{\circ }\text{F } \\ t=t_2-t_1=50-(-33)=83^{\circ }\text{F} \end{gathered}$$

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