agkaur23
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James is x years old, the sum of him and his brother's age is 10.

3 years ago, James brother was three times older than James. Use this to write an equation

Respuesta :

sqdancefan

9514 1404 393

Answer:

  7-x = 3(x -3)

Step-by-step explanation:

The brother's age is 10-x. Three years ago, their ages were (x-3) and (7-x). At that time, the relation between their ages was ...

  7-x = 3(x -3)

_____

The solution is ...

  16 = 4x . . . . add 9+x

  x = 4 . . . . . . divide by 4

James is 4; his brother is 6.

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