(1-x/3)/(1-x/5)=1/3
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(1-x/3)/(1-x/5)=1/3
(1-x/3)/(1-x/5)=1/3
(1-x/3)/(1-x/5)=1/3
(1-x/3)/(1-x/5)=1/3
[(3-X)/3]/[(5-X)/5]=1/3
(3-X)/3= (5-X)/15
5*(3-X)=(5-X)
15-5X=5-X
10-4X=0
X=5/2
(3-x)(5-x)=5
x^2-8x+10=0
解得x=4加减根号6
1-x/5-x/3+x²/15=1/3
1-7x/15+x²/15=1/3
x²-7x+10=0
(x-5)(x-2)=0
x1=5,x2=2
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
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