Answer Posted / abi

JUST BY TRIAL AND ERROR METHOD :
PUT
A=4
B=2
C=6
D=5
E=3
F=8
G=1
H=9
I=7

A+B+C+D=17
4+2+6+5=17

D+E+F+G=17
5+3+8+1=17

G+H+I=17
1+9+7=17

HENCE,
D=5
G=1

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