In the graph below, Point A represents Owen’s house, Point B represents David’s house and Point C represents the school. Each unit on the graph represents 1.5 miles. How many miles does Owen live from the school?

Let one number be x and the second number y
x + y = 82
x - y = 24 
To solve by elimination add the two equations together to get
2x = 106
x = 53

If one number is 53 substitute x=53 into the first equation.
53 + y = 82
y=82-53
y=29
Check in the other equation
53-29 = 24.
X+Y=82
X-Y=24 NOW ADD THESE 2 EQUATIONS

2X=106
X=106/2
X=53 SOLUTION

53+Y=82
Y=82-53
Y=29

53-29=24
24=24
SO THE ANSWER IS D.
HOPE I HELPED!!