Question

Twice a number is decreased by 7 , and this quantity is multiplied by 3. The result is 9 less than 10 times the number. What is the number?

Answer 1

The missing number is equal to 3.

Explanation:

(2x - 7) * 3 = 10x - 9.

6x - 21 = 10x - 9.

12 = 4x.

3 = x.