A+B=91 C+B=78 A+C=65 A B C
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![A+B=91 C+B=78 A+C=65 A B C](/uploads/image/z/332993-65-3.jpg?t=A%2BB%3D91+C%2BB%3D78+A%2BC%3D65+A+B+C)
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A+B=91 C+B=78 A+C=65 A B C
A+B=91 C+B=78 A+C=65 A B C
A+B=91 C+B=78 A+C=65 A B C
c=(91+78+65)%2-91=26
a=(91+78+65)%2-91=39
b==(91+78+65)%2-91=65
A=39,B=52,C=26
39 52 26
A=39
B=52
C=26
(A+B)-(A+C)=B-C=26
C+B=78即:B=52,C=26,A=39
A=39 B=52 C=26