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secondary 4 | A Maths
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Please help me, thank you so much
Date Posted: 5 years ago
Views: 269
Let X be the first digit.
Let Y be the second digit.
The first clue:
10X + Y = 4 (X + Y)
6X = 3Y
2X = Y
The second clue:
10X + Y = 10Y + X - 27.
9X = 9Y - 27
X = Y - 3
Now we combine the clues together:
2X = Y
X = Y - 3
X = 2X - 3
X = 3
Y = 6
Therefore, the 2 digit number is 36.
Let Y be the second digit.
The first clue:
10X + Y = 4 (X + Y)
6X = 3Y
2X = Y
The second clue:
10X + Y = 10Y + X - 27.
9X = 9Y - 27
X = Y - 3
Now we combine the clues together:
2X = Y
X = Y - 3
X = 2X - 3
X = 3
Y = 6
Therefore, the 2 digit number is 36.
Thank you so much
You're welcome!
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