Using proportions, it is found that the value of x is of 5.
What is a proportion?
A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.
In this problem, since Figure A is a scale of Figure B, the side lengths are proportional, hence the following rule of three is established:
x/12.5 = 2/5
Applying cross multiplication:
5x = 25
x = 5.
More can be learned about proportions at https://brainly.com/question/24372153
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