Twice the difference of a number and 2 is 9 .

Question

Need help with this one where do i begin

Answer 1

The difference of a number and 2:  x-2

Twice the difference of a number and 2:  2(x-2)

Is 9:  = 9

 

2(x-2) = 9

2x - 4 = 9

2x = 13

x = 13/2 = 6 1/2