X÷50-3=X÷70+5

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X÷50-3=X÷70+5X÷50-3=X÷70+5X÷50-3=X÷70+5先去分母,两边同乘350得350(X÷50-3)=350(X÷70+5)7x-1050=5x+1750然后移项,得7x-5

X÷50-3=X÷70+5
X÷50-3=X÷70+5

X÷50-3=X÷70+5
先去分母,两边同乘350得
350(X÷50-3)=350(X÷70+5 )
7x-1050=5x+1750
然后移项,得
7x-5x=1750+1050
2x=2800
则x=1400

X×X-3X+1=0求分式X×X÷〈X×X×X×X+3X×X+1〉 X÷50-3=X÷70+5 0.3+0.3x=0.39 x= 2x-1.5x=7.6x x= 0.36x÷0.3=1.2 x=6(x+1.2)=18.6 x= 7x+2x = 8.1 x= (x-5)÷3=1.7 x=5(x+1.1)=15.5 x= 9x+25=70 x= 7x-4x=2.1 x= 8x-5.5x=7.57.2x÷3.6=2 3x+6x-8x=0.7 12x-2x-5x=4.512x-x=0 5x+x=1.8 3.2x+1.8x=64.8x-0.8x=6 6.3-0.3x=9.6 8.6x-8.5x=0.720x-2x=36 9x+6x=4.5 18x-12x=5.42x-1.6x=3.6 18x+3x=7×6 1.2x-0.5x=0.71.3x+2.7x=1 4x-3.2x=6.4 0.8x+3.2x+3x=562.8x-2x=7.2 8x^2-4x/x^2-x-6÷(x-3/x+2-x+2/x-3),其中x=5 5X(X-X)=3(X+X)这个方程帮忙解一下 化简 [3x/(x+2)-x/(x=2)]÷x/(x^2-4)化简 [3x/(x+2)-x/(x-2)]÷x/(x^2-4 解方程:(1)2x-19=7x+31 (2)20-2x=x-1 (3)19-x=100-10x (4)1/3x+5=2/3x-62x-19=7x+317x-2x=-19-31这里应该是31+19吧?5x=-50x=-50÷5x=-10 x÷2+x÷5=3,x=? (x一1.7)÷3=1.8 7x-3.4x=0.72 o.5x+7 X 0.5=7解方程 x-50/3=x+70/5? 化简:2|x| -3x÷|2x-|5x|| 1.(-2a)³·b²÷(8a³b²) 2.-5x(2x²-3x+4)+4x³+15x3.(x²-2y²)(x+2y)-2xy(x-y)4.(x-y+z)(x-y-z)化简求值 [(x+y)(x-y)-(x+y)²-2y(x-2y)]÷(-2y),其中x=5,y=2003 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 x-3/x²-1 ÷ (x-3)(x+1)/x²+2x+1 + 1/x+1,其中x=2 已知:x+3/x+2=1/根号3+根号2+1,求x-3/2x-4÷(5/x-2-x-2)的值 x+3/x+2=1/根号3+根号2+1,求x-3/2x-4÷(5/x-2-x-2)的值您写错了吧 已知f(x)=10x^2+8x^5-12x^3求:f(x)÷(-5x^2)和f(x)×(x^2-1)的值