Question

14. The sum of the digits of two-digit number is 16. Reversing its digit decreases the value of the number by 18. Find the number using elimination.​

Answer 1

let, two digit 8+8=16

reversingdigit = 4*4+2=18. this us answer

Answer 2

Answer:

for 14

Let the tens digit=x

and units digit=y

Hence sum x+y=16……………(i)

Number =10x+y

Number formed by reversing the digits =10y+x

(10y+x)-(10x+y)=18 i . e. 9y-9x=18

Or y-x=2…………..(ii)

Adding (i) and (ii) gives 2y=18

Hence y=9

hence from (i) x=16-y=16–9=7

hence Number =79