Twice a number is decreased by 9, and the sum is multiplied by 4. The result is 8 less than 10 times the number. What is the number?

Question

I need help on this problem, has been confusing me all day now, big thanks to who ever helps me.

Answer 1

4(2n -9) = 10n - 8

8n - 36 = 10n - 8

2n = -28

n = -14