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Consider the following reactions:

A + 2B → C + D    ?H = -68 kJ

E + 2B → C + F    ?H = 188 kJ

F + G → D           ?H = -79 kJ

What is ?H for    E + G → A ? 

It is possible that your answer could be either positive or negative. If it is negative, you must include the "minus" sign. Enter your answer as a decimal number.

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