Answer:
49 see image
Step-by-step explanation:
When you are shrinking or enlarging your shape, be sure to compare the same things in the same order. Here we just kept putting the original length of the side on top and the new length of the side on the bottom. 2/7 is what they said to make the enlargement. The original length if the longest side was 14. So the 14 goes on top where we were putting the original lengths and x (bc we dont know it yet) is the new length that goes on the bottom of the fraction (it's a ratio, written like a fraction, so we can do mathy work on it). See image.
