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Artemon [7]
3 years ago
9

Mike thought of a number. He added to it to two other numbers. One of these numbers was 12 less than his number, the other was 1

2 more than his number. The result of the addition was 15. What was Mike’s original number?
If Mikes original number is x, the equation is?

The number is?
Mathematics
1 answer:
Inessa [10]3 years ago
5 0

Answer:

number 1  + number 2 + number 3 = 15

Number 1 = x + 12

Number 2 = x - 12

Number 3 = x

(x + 12) + (x - 12) + x = 15

x + 12 + x - 12 + x = 15

x + x + x +12 -12 = 15

3x = 15

x = 15/3 = 5

Check:

Number 1 = 17

Number 2 = 5 -12 = -7

Number = 5

number 1  + number 2 + number 3 = 15

17 + (-7) + 5 = 15

10 + 5 = 15

15 = 15

Answer is 5

Step-by-step explanation:

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PERT estimate is a measuring strategy that is based on a weighted average. It is used in measuring the uncertainty and risk via three estimates to determine an estimated likelihood for a project's cost or period of completion.

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Rounded figure is equal to 15.

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