Answer: x = 3
Step-by-step explanation: This might not be the correct way to find the answer, but I hope this helps.
We have to try to figure out what (x) is...
6(4+1)+1 = 31 because 6 x 5 is 30 and + 1 is 31
6(5+1)+1 = 36 because 6 x 6 is 36 and + 1 is 37
6(2+1)+1 = 19 because 6 x 3 = 18 and + 1 is 19
All of these equations are wrong, none of them equal 25 besides...
6(3+1)+1
3+1=4
6x4=24
24+1
25
Have a good day :D