X=25 is the answer
EXPLANATION:
Since we have here similar triangles, then 2x+2/x+3 must be equivalent of 26/14
2x+2/x+3=26/14
2x+2/x+3=13/7
7(2x+2)=13(x+3)
14x+14=13x+39
x=25
The answer is 3. 1/6 because there are 6 sides in the cube. So the probability of getting a certain number is 1/6.