Question

a+two+digit+number+is+such+that+the+sum+of+its+digit+is+8+if+54+is+subtracted+from+the+number+its+digits+are+reversed+find+the+number

Answer 1

no =10x+y

it's sum =8

if 54-10x+y=10y+x

10x+y -(10y+x)=54

9x-9y=54

x-y=54/9

x-y=6

x+y=8

2x=14

x=7

y=1