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Goryan [66]
3 years ago
11

River C is 400 miles longer than River D. If the sum of their lengths is 5560 ​miles, what is the length of each​ river?

Mathematics
1 answer:
KiRa [710]3 years ago
5 0

Answer:

River D - 2580 miles

River C - 2980 miles

Step-by-step explanation:

Let the length of River D be represented with x

length of river C = 400 + x

total length of both rivers = 5560

x + 400 + x = 5560

2x + 400 = 5560

collect like terms

2x = 5560 - 400

2x = 5160

divide both sides of the equation by 2

x = 5160 / 2

x = 2580

length of river c = 400 + 2580 = 2980

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