A) 36
B) 63
C) 18
D) Data inadequate
Correct Answer: B
Solution :
Given expression, \[10x+y=7\,\,(x+y)\] \[x-2y=0\] \[\therefore \] \[x=2y\] ?(i) When each digit increased by 3, \[10\,\,(x+3)+(y+3)=6\,\,(x+3+y+3)+6\] \[4x-5y=9\] From Eq. (i), \[8y-5y=9\] \[y=3,\]\[x=6\] \[\therefore \] The given number is 63.You need to login to perform this action.
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