20.
Lets x = the small number
the large number is 15 more than the smaller number = x + 15
Sum of those 2 numbers = 121
So x + x + 15 = 121
2x + 15 = 121
2x = 106
x = 53
Small number = 53
Large number = 53 + 15 = 68
21)
Lets x = Caleb's points
Luke's points= fifteen less than twice the # of Caleb has = 2x - 15
They both have total 201
So x + 2x - 15 = 201
3x - 15 = 201
3x = 216
x = 72
Luke scored = 2(72) - 15 = 144 - 15 = 129 points