You divide a number by 3 add 6 then subract 7 the result is 4

+6 - 7 = 4
Subtract 6 from each side of the equation

-7 = -2

Now add 7 to both sides of the equation.

= 5

Finally multiply by 3 on both sides to undo the division

n= 15

Check
15/3 + 6 -7 = 4
5     + 6  -7 = 4
     11-   7 = 4
        4    =   4

The answer is 76° i believe