Mickey and Donald had different number of balls at first. After Mickey gave Donald 0.25 of his balls, Donald had more balls than him. Donald then gave Mickey 1/4 of his new number of balls and they had 54 balls each at the end. What was the number of balls Mickey had at first?
0.25 = 1/4
(4) - (1) = 54
(3) = 54
(1) = 54/3
(1) = 18
(3) + (1) = 54
(3) + 18 = 54
(3) = 54 - 18
(3) = 36
(4) = 36/3 * 4
(4) = 48 balls Mickey have at first