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Helen [10]
3 years ago
9

Un numero mas su doble es igual a su mitad mas quince ¿cual es el numero ?

Mathematics
1 answer:
n200080 [17]3 years ago
4 0

For this case we have:

"One number plus its double equals its half plus fifteen, what is the number?"

x: Let the variable that represents the unknown number

According to the statement we have:

"One number plus its double" is represented as:x + 2x

"Its half plus fifteen" is represented as: \frac {x} {2} +15

Then we have the following expression:

x + 2x = \frac {x} {2} +15

We solve the equation:

3x = \frac {x} {2} +15\\3x- \frac {x} {2} = 15\\\frac {6x-x} {2} = 15\\\frac {5} {2} x = 15\\5x = 30\\x = \frac {30} {5}\\x = 6

So the number is 6

Answer:

x = 6

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