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3 years ago

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River C is 100 miles longer than River D. If the sum of their lengths is 5,560 miles, what is the length of each river?

1 answer:

Elan Coil [88]3 years ago

5 0

$x-\ length\ of\ river\ D\\\\
x+100-\ length\ of\ river\ C\\\\
x+x+100=5560\\\\
2x+100=5560\ \ \ | subtract\ 100\\\\
2x=5460\ \ \ | divide\ by\ 2\\\\
x=2730miles\\\\
2730+100=2830miles\\\\
River\ C\ is\ 2830\ miles\ long\ and \ river\ D\ is\ 2730\ miles\ long.$

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