-5
Explaination:
x+2 x-2
------ = -------
3 7
7 (x+2)=3(x-2)
Distribute 7 and 3
7x+14+3x-6
Move constant to the right side and change the sign
Move the variable to the left and change the sign
7x-3x= -6,-14
Like terms
and caculate the sum or diffrence
4x= -20
Divide both sides by 4
x= -5