1500除以x减去1800除以1.5x等于负30
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x/(y-x)
左右同乘24去掉分母即8x+20-(9x-6)=2426-x=24x=2
x²/25-y²/16=1a=5,b=4,c=√41e=c/a=(√41)/5焦点坐标(√41,0),(-√41,0)顶点坐标(5,0),(-5,0)x²/5-y
(x÷0.4)-(2×5.3)=30.4x÷0.4-10.6=30.4x÷0.4=30.4+10.6x÷0.4=41x=41×0.4x=16.4
图再问:对么再答:对再问:◥◤~~~~◥◤ ┃ ┃≡━﹏━≡ ┗━━┳∞┳━━┛ ┏┫ ┣┓再答:谢谢采纳再答:Thankyou
x/(x-1)-2x-2/x=x²/x(x-1)-2x²(x-1)/x(x-1)-2(x-1)/x(x-1)=(-2x³+3x²-2x+2)/x(x-1)
90/X-90/3X=3270/3X-90/3X=3160/3X=3180=9XX=20再问:请再帮帮忙吧:解方程2.4∕5X-2.4∕6X﹦1.6再答:2.4∕5X-2.4∕6X﹦1.614.4/X
[(56-x)/4]^2-[(x/4)^2]=100方程同时*4^2得(56-x)^2-x^2=1600打开平方项x=1536/112=96/7=13.7
c=√(a²+b²)e1=c/a,e2=c/be1+e2=c*(1/a+1/b)=c(a+b)/(ab)(e1+e2)²=c²*(a+b)²/(a
4x/(2x-1)-(x+1)/(x-2)=1先通分[4x(x-2)-(x+1)(2x-1)]/[(2x-1)(x-2)]=14x2-8x-(2x2+x-1)=2x2-5x+2x=-1/4其中x2代表
是不是X除以3减去4等于x除以4减去1X*1/3-4=X*1/4-1X/3-4=X/4-1X/3-X/4=34X-3X=36X=36
x=(√20-4)/2=(2√5-4)/2=√5-2所以x²=(√5)²-4*√5+4=9-4√51/x=1/(√5-2)=(√5+2)/[(√5)²-2²]=
就是(x/200)-(x/250)=15两边同乘以10005x+4x=15000x=15000
/>x/1500+x/1200=64x/6000+5x/6000=69x/6000=69x=6×60009x=36000x=36000÷9x=4000再问:非常正确,谢谢你,可我就是看不懂,笨啊,你能
x^2+1/x^2-1减去x-2/x-1除以x-2/x=(x²+1)/(x²-1)-(x-2)/(x-1)÷(x-2)/x=(x²+1)/(x²-1)-x/(x
75-6.5/x=656.5x=75-656.5/x=1010x=6.5x=0.65