if eight times a number is increased by 9, the result is 9 times that number. What is the number

Question

if eight times a number is increased by 9, the result is 9 times that number. What is the number

Answer 1

let x = the number

 

then 8x + 9 = 9x

 

solving, x = 9

 

Proof: (8 x 9) + 9 = 9 x 9; 72 + 9 = 81, and 81 = 81