Answer:
12
Step-by-step explanation:
As you replied in the comment, I will assume this is an equilateral triangle.
This means:
4x - 10 = 5x - 22 = 3x + 2
We will only look at 2 of these equations for now - the first two.
4x - 10 = 5x - 22
Rearrange to get x on one side and the integers on the other.
-10 + 22 = 5x - 4x
12 = x
Now we will substitute this into all 3 equations to check if it's right. If it is, they will all equal the same value.
4x - 10 = 4(12) - 10 = 48 - 10 = 38
5x - 22 = 5(12) - 22 = 60 - 22 = 38
3x + 2 = 3(12) + 2 = 36 + 2 = 38
