[(x÷2+9)]÷[(x÷2-9)]=5/8 急 明天交啊
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[(x÷2+9)]÷[(x÷2-9)]=5/8急明天交啊[(x÷2+9)]÷[(x÷2-9)]=5/8急明天交啊[(x÷2+9)]÷[(x÷2-9)]=5/8急明天交啊[(x÷2+9)]÷[(x÷2-
[(x÷2+9)]÷[(x÷2-9)]=5/8 急 明天交啊
[(x÷2+9)]÷[(x÷2-9)]=5/8 急 明天交啊
[(x÷2+9)]÷[(x÷2-9)]=5/8 急 明天交啊
[(x÷2+9)]÷[(x÷2-9)]=5/8
(x+18)÷(x-18)=5/8
8(x+18)=5(x-18)
8x+144=5x-90
8x-5x=-90-144
3x=-234
x=-78
(x+18)/(x-18)=5/8
8x+144=5x-90
3x=-234
x=-78
[(x÷2+9)]÷[(x÷2-9)]=5/8
8(x÷2+9)=5(x÷2-9)
4x+72=2.5x-45
1.5x=-117
x=-78
x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)2.2/3+x/(3x-1)=1/9x-3
先化简,再求值:9-x²/x²+6x+9÷x²-3x/2x+6-2/x²-x,其中x=6
(2x-6)/(x^2-9)+(x^2+2x+1)/(x^2+x-6)÷(x+1)/(x-2)
(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)
数学题x-15/x^2-9-2x/9-x^2÷x/3+x
计算:(-9x^2+3x)÷(-3x)=
x^2-x/x+1÷x/x+1 ;x^2+6x+9/x^2-9÷x+2/x-3;2/a÷4/a
若x等于它的倒数则(x-1)(x+2)/x-1÷x^2-9/x+3=
若x等于它的倒数则(x-1)(x+2)/x-1÷x^2-9/x+3=
(x-1/x²+6x+9)÷(x²-1/x+3)=(x+1/2)
(x-1/x²+6x+9)÷(x²-1/x+3)=(x+1/2)
若x=3/x,则[(x^2-6x+9)/(x+3)]÷[﹙x-3﹚/﹙x^2+6x+9﹚]=?
若x=1/x,则(x²2-6x+9)/(x-3)÷(x+3)/(x²+6x+9)的值是
x-2/(x^2-9)(1+(2x-7/x^2-4x+4)÷(x+1)/(x+3)其中x=2010
21分之10x÷3分之2=7分之3x-3分之1x-2分之1x=190x-53x=7408.5x-6.9x=43.3x-200=0.2x+1101.02+0.4x+2.6x=3.428.9x-67=4.5x+656x-58=3x+1410x-20=5x+806x+5=10x-3420-1.4x=9.8x-288.2x+5.4x=272
先化简,再求值:(1)(x+1/x²-x-x/x²-2x+1)÷1/x,x=根号2+1 (2)(1+x-3/x+3)÷2x/x²-9 x=根号3+3 (3)4-x/x-2÷(x+2-12/x-2)x=根号3-4 (4)x-3/2x-4÷(5/x-2-x-2) x=根号3-2
(1-x/3-x)^2÷(x^2-6x+9/9-x^2)*1/x^2-2x+1
(x+1/x+3)²÷x²-1/x²-9·(x-2)(x+1)/x-3计算