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Novosadov [1.4K]
3 years ago
12

PLS HURRY HAVE 10MIN. LEFT

Mathematics
1 answer:
Andre45 [30]3 years ago
7 0

Answer:

  • 27

Step-by-step explanation:

Let the tenth digit is x and units digit is y.

<u>We have the following equations:</u>

  • y = x + 5
  • (x + y)*3 = 10x + y

<u>Simplify the second equation:</u>

  • 3x + 3y = 10x + y
  • 2y = 7x

<u>Solve by substitution:</u>

  • 2(x + 5) = 7x
  • 2x + 10 = 7x
  • 7x - 2x = 10
  • 5x = 10
  • x = 2

<u>Find y:</u>

  • y = 2 + 5
  • y = 7

The number is 27

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