Question

the sum of the digit of a two digit number is 7 if the digits are reversed the new number decreased by 2 equal to twice the original number find the number

Answer 1

Given,X+y=7......(1)

According to Question,

10y+x-2=2(10x+y)

19-8y+2=0...... (2)

Solving (1)and (2) you will get

X=2 , Y=5

Answer 2

Answer:

Given,X+y=7......(1)

According to Question,

10y+x-2=2(10x+y)

19-8y+2=0...... (2)

Solving (1)and (2) you will get

X=2 , Y=5