(2X+1)÷2×3+1=7
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(2X+1)÷2×3+1=7
4/5X-(465-X)×2/3=20
1又1/3-1/40X=91又1/3-1/50X)×1/2
4/5X-(465-X)×2/3=20
1又1/3-1/40X=91又1/3-1/50X)×1/2
(2X+1)÷2×3+1=7
(x+0.5)×3+1=7
3x+2.5= 7
x=1.5
4/5X-(465-X)×2/3=20
0.8x-310+x=20
22\15x=330
x=225
1又1/3-1/40X=(91又1/3-1/50X)×1/2
4/3-1/40X=274/3×1/2﹣1/50X×1/2
4/3-1/40X=274/6-1/100X
4/3-274/6=-1/100X+1/40X
X=-26600/9
(x+0.5)×3+1=7
3x+2.5= 7
x=1.5
4/5X-(465-X)×2/3=20
0.8x-310+x=20
22\15x=330
x=225
1又1/3-1/40X=(91又1/3-1/50X)×1/2
4/3-1/40X=274/3×1/2﹣1/50X×1/2
4/3-1/40X=274/6-1/100X
4/3-274/6=-1/100X+1/40X
X=-26600/9
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
2x²+7x+1=0 x(x-1)=3x+7
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1/x-2=7x/(x-2) -3
(3-x)/(1-x)-(5-x)/(7-x)+(x^2-x)/(x^2-8x+7)=1
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值
解方程(x+1/x+2)-(x+2/x+3)=(x+5/x+6)-(x+6/x+7)
x+2/x+3-x+1/x+2=x+8/x+9-x+7/x+8
解方程:x+2/x+1-x+3/x+2=x+6/x+5-x+7/x+6