The temperature was 32° at dawn. By noon, the temperature had risen 15°. By midnight, the temperature had fallen again by 57°. What was the temperature at midnight?

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Answer 1 · 2016-04-07T09:48:13

The Temperature at midnight was #-10°#

Given:

Temp at Dawn #(x)=32#
Temp at Noon #(y)=15#
Temp at Midnight #(z)=-57#

Getting this into an equation for noon:

#x+y#

#32+15#

#x+y=47°#

Now, #x+y+z#

#47+(-57)#

#47-57#

#-10°#

The Temperature at midnight was #-10°#