Step-by-step explanation:

While subtracting , the sign of each term of second expression changes & remove the parentheses.
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Combine like terms. Like terms are those which have the same base. Only coefficients of like terms can be added or subtracted.
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In standard from , the expression should be written in such a way that the power of variables goes from highest to lowest.

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Answer:
1.25 inches
Step-by-step explanation:
200 miles/ 50 miles = 5 inch / x
x = (50 x 5) / 200 = 250 / 200 = 1.25
I hope this is helpful!
Answer: 3 R2