Fortune Telling Collection - Fortune-telling birth date - The x power of 25 = the y power of 2000. 80 = 2000. Require the value of X+Y-XY, which should be understandable. Don't divide by the same radix power. You haven't learned yet. It is urgent.
The x power of 25 = the y power of 2000. 80 = 2000. Require the value of X+Y-XY, which should be understandable. Don't divide by the same radix power. You haven't learned yet. It is urgent.
25^x=2000
(25^X)^Y=2000^y
That is, 25 xy = 2000 y ①.
80^y=2000
(80^y)^x=2000^x
That is, 80 xy = 2000 x ②.
① * ② Get (25 * 80) xy = 2000 (x+y)
2000^xy=2000^(x+y)
So xy=x+y
X+Y-XY
=xy-xy
=0
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