The weight of r refrigerators is 200r. The weight of p pianos is 525p. The total weight must not exceed 5900 lb. So, the total weight of r refrigerators and p pianos must satisfy ...
200r +525p ≤ 5900
In addition, we cannot have negative refrigerators or pianos, so we must also have ...
r ≥ 0
p ≥ 0
A graph is attached.
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The point (r, p) = (13, 8) is not in the solution space. 13 refrigerators and 8 pianos would overload the truck.
Since the 10 will be the denominator you will need to divide it by 2 and get 5. After that you multiply the denominator of 10 and numerator of 1 by 2 and get 4/10
