Question 880766
x = person 1
y = person 2
x+y =75
x+15 = 2y
y = (x+15)/2
x+(x+15)/2 = 75
*[invoke explain_simplification "x+(x+15)/2 = 75" ]

So x=45
x+15 = 2y
so 2y = 60
y=30