Answer:
1) 90 < x < 110
2) 2 < x < 12
Explanation:
By the triangle inequality, the sum of the lengths of the shorter two sides of any triangle must be greater than the length of the longest side.
In the first example, this implies that x must be strictly between 90 and 110, and in the second example, x must be strictly between 2 and 12.
Hope this answers your question.