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Do not repeat 1 -- 9 to form two additions and one subtraction （）+（）=（） （）+（）=（） （）+（）=（）
There is no answer
Let a, B, C, D, e, F, G, h, I be unknown 1 ~ 9;
There are A-B = C; D-E = f; G + H = I;
Then: a = B + C; d = e + F; I = G + H;
-> a+d+i = b+c+e+f+g+h
Because: a + B + C + D + e + F + G + H + I = 45
Then: a + D + I = 45 / 2 and a, D, I are integers
So there is no solution!
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