Answer:
It´s -12
Step-by-step explanation:
Its -12 because the two lengths are the same, so the sum must be the same. -12+25 is 13, so we should get 13 on the top as well. 2*-12 is -24. -24+29 is 5. and 5+8=13. 13 = 13.
I doubt it is not going to be a great
