Question 1185755
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Again, it depends on the question, which absents in your post.


For example, if the question is to find the total area of the expanded garden, then you do not need any equation.




My impression is that you are former  English teacher and work now as a creator of  Math problems (or try to do it . .. )


This activity  (to be a composer)  requires some  COMPETENCE  ( ! )




At least,  you should know 


        What the Math problems are and how to formulate them (!)