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:

$t_{1}=-33 \ ^\circ \text{F} \ \\ t_{2}=50 \ ^\circ \text{F} \ \\ \ \\ t=t_{2} - t_{1}=50 - (-33)=83 ^\circ \text{F}$

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