X÷(X-9)=3.25 (X-7)÷(45-X)=1

X÷(X-9)=3.25 (X-7)÷(45-X)=1 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-2/(x^2-9)(1+(2x-7/x^2-4x+4)÷(x+1)/(x+3)其中x=2010 (x+x)+(x-x)+(x*x)+(x÷x)=81 x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, 当x=9/2时,求(x^2+7x+10)/(x^2+6x+5)×(x^3+1)/(x^2+4x+4)÷(x^2-x+1)/(x+2) x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)2.2/3+x/(3x-1)=1/9x-3 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= x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 5x+7=42 x÷4.2=2 3.6x-x=3.25 2（x-5x+7=42 x÷4.2=2 3.6x-x=3.25 2（x-3）=5.8.解方程 如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少 5x÷8-3x=40 7x-8=42+3x 9x+7-3x=9x-3 9x+27=812.5x-12=460.5X(7x+28x)=14.7(4x-4.8)÷4=12442.2X2-5.8x=32.2 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 先化简,再求值：9-x²/x²+6x+9÷x²-3x/2x+6-2/x²-x,其中x=6 130%x+x=4.6 x÷50%=10 x/9-x/15=16% (x+7/x+6) +(x+9/x+8)=9x=(x+10/x+9) +(x+6/x+5)