What is this

5

Step-by-step explanation:

On the LHS (Left Hand Side) 13-6 is 7

So we need to find a number that subtracts into 12 that makes 7 which is 5,

12-5=7

So 5 is the solution

5

Step-by-step explanation:

13 - 6 = 7 which is equaled to  12 - 5 = 7

hope this helped :)

a. 74 degrees

step-by-step explanation:

because the lines through the side and the box in the corners shows that these are congruent triangles and since they are mirrored the 37 degrees is also mirrored so the answer is 37 * 2 which is 74.

x= 3^y

step-by-step explanation: