text: /* Make a function that returns the value multiplied by 50 and increased by 6. 
  If the value entered is a string it should return "Error".
  
  Note: in C#, you'll always get the input as a string, so the above applies if 
  the string isn't representing a double value.
  */
  
  //Solution using 'typeof'
  function problem(x){
    return (typeof x === 'string') ? 'Error' : ((x * 50) + 6);
  }
  