Question

a number consists of two digits whose sum is 9 if 27 is subtracted from the number the digits interchange their places find the number this is a question of linear equation in one variable​

Answer 1

Answer:

x+y=9 and the no.be 10x+y......1

10x+y-27=10y+x

9(x-3)=9y

x-3=y

as x=9-y;substituting it in above

6-y=y

y=3 and x is 6

therefore the no. is 10×6+3=63.