For going to a city B from city A there is a route via city C such that `AC botCB`, AC =2x km and CB = 2(x + 7) km. It is proposed to construct a 26 km highway which directly connects the two cities A and B. Find how much distance will be saved in reaching city B from city A after the construction of the highway.

Explanation

To solve the problem step by step, we will follow the given information and apply the Pythagorean theorem to find the distances involved.

### Step 1: Define the distances
Given:
- AC = 2x km
- CB = 2(x + 7) km

### Step 2: Use the Pythagorean theorem
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