5x+1/5=2 4/7x-1/5x=2 1/3x-1/7=3/7 (2-5/6)x=14
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5x+1/5=24/7x-1/5x=21/3x-1/7=3/7(2-5/6)x=145x+1/5=24/7x-1/5x=21/3x-1/7=3/7(2-5/6)x=145x+1/5=24/7x-1/5
5x+1/5=2 4/7x-1/5x=2 1/3x-1/7=3/7 (2-5/6)x=14
5x+1/5=2 4/7x-1/5x=2 1/3x-1/7=3/7 (2-5/6)x=14
5x+1/5=2 4/7x-1/5x=2 1/3x-1/7=3/7 (2-5/6)x=14
5x+1/5=2
5x=9/5
x=9/25
4/7x-1/5x=2
20x-7x=70
13x=70
x=70/13
1/3x-1/7=3/7
1/3x=4/7
x=12/7
(2-5/6)x=14
7/6x=14
x=12
5x+1/5=2 4/7x-1/5x=2 1/3x-1/7=3/7 (2-5/6)x=14
5x=2-1/5 13/35x=2 1/3x =4/7 7/6x =14
x=9/25 x=2×35/13 x=4/7×3 x=14×6/7
x=70/13 x=12/7 x=12
*-----------------------------------------------*| 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 ||
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
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已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10)
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