Hi,

silvio is 10 years older than maria's age    . 

The sum of their ages is equal to four times maria's age.

 How old are silvio and maria? Write an equation. 

    + (  + 10) = 4x

   10 = 2x

   x = 5, Maria's age.  Silvo is 15.

  CHECKING our Answer***

    5 + 15 = 4·5 = 20 

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