9 times the difference of y and 5. It breaks down into the parenthetical expression, to find the difference of y and 5, i.e. subtraction. Then multiply that by 9. It should look like this

`9(y-5)=x`

9 times the difference of y and 5. It breaks down into the parenthetical expression, to find the difference of y and 5, i.e. subtraction. Then multiply that by 9. It should look like this

`9(y-5)=x`