Respuesta :

wegnerkolmp2741o

Answer:

D

Step-by-step explanation:

increase means + and decrease  means -

A. +2 -6 = -4

B -5+1 = -4

C +6 -4 = 2

D -7+7 =0

We want to end up where we started which is a net gain of 0

epicyolo64

Answer:

D

Step-by-step explanation:

If the temperature decreases by 7 then increases by 7, then it is the same temperature. x-7+7=x