Question

Six times a number is 21 less than nine times the same number​

Answer 1

7

Explanation:

6*7=42

9*7=63

63-42

Answer 2

number is 7

Explanation:

let the number be n , then

6n = 9n - 21 ( add 21 to both sides )

21 + 6n = 9n ( subtract 6n from both sides )

21 = 3n ( divide both sides by 3 )

7 = n

That is the number is 7