Answer:
42.194988
Step-by-step explanation:
There are 42.194988 km in 1 marathon
2y=52
1st equation *(-3) and 2nd *(2)
-6x-10y=34
6x+12y=18
eliminate -6x and 6x
add both equations
$7,429 I think (it has to be 20 characters ignore this part)