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gtnhenbr [62]
3 years ago
9

Please help me out here! :)

Mathematics
1 answer:
Sergio [31]3 years ago
6 0

Answer:

it would take 23 hours

Step-by-step explanation:

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Answer:

The cost of the diamond last year is x = $ 830

Step-by-step explanation:

Let the cost of diamond last year = x

the cost of diamond present year = y

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⇒ y = 2 x + 10  ------ (1)

The sum of the cost (last year and this year) is  = $ 2500

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