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pogonyaev
3 years ago
14

Ten times a number decreased by seven equals 101 plus that number. Find the number

Mathematics
1 answer:
nadya68 [22]3 years ago
8 0
The number is twelve.
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What has she done wrong?
Strike441 [17]

Answer:

see explanation

Step-by-step explanation:

Her error is in squaring (2y)²

She has (2y)² = 2y²

when it should be 2y × 2y = 4y²

Then

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vampirchik [111]

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4.2

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