how digits in ? marks
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Answer:
IN 1st row 3D+A=29........(i)
from 4th row 4A=32
=>A=8
frm eq (i)=> 3D=29-A=29-8=21
=>D=7
Now from 1st clm A+2B+D=31
=>2B=31-(A+D)=31-15=16
=>B=8
Now frm 3rd clm D+2A+C=28=>C=28-(D+2A)
=>C=28-23=5
Now we find ,
A+D+B+A=8+7+8+8=31. .....(ans...1)
Again,B+B+C+C=8+8+5+5=26.....(ans.....2)
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