Brain teaser Flag of Andorra

Given: 4 unknown elements with unique integer numbers from −9 to 9.

Task: calculate result of last equation.

×
+
=−5
+
×
=−2
×
=−81
×
=71
÷
×
=?8
A = = 2
B = = 0
C = = −1
D = = −9

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