(Will mark brainiest if right) Kelly recorded the number of people who wore School Shirts to the football game on Saturday of the 525 fans 224 wore school shirts if 840 people are expected to attend next Saturday how many of them would Kelly expect to be wearing school shirts (the picture is your answer choices)

358

Step-by-step explanation:

let x =  the tenth digit   and y the unit digit 

is seven times the sum of its digits.  7( x+y)  = 10 x +y 
7x + 7 y = 10x + y
3x =  6y     x= 6y / 3 = 2y    x= 2y 

we have that the tens digit is 3 more than the units digit so 
x = 3 + y
we replace it in the first equation   x= 2y
  3+ y = 2y 
 y=3 

and x= 6 
so the number is  63