0.6x除以2等于1.8除以4-搜答案-灵鹊做题网

X÷2/3÷4/5=120X÷(2/3×4/5)=120X÷8/15=120X=120×8/15X=64或者X÷2/3÷4/5=120X=120×4/5×2/3X=96×2/3X=64

题是这样的不,x/4+2x/3+x/2=51去分母得：3x+8x+6x=712x=612/17x=36

2X除以7加4分之1X的和除以5X除以7加3X除以4=(2X/7+X/4)/(5X/7+3X/4)=(8X+7X)/(20X+21X)=15/41

48除以x等于72除以(x+4)48(x+4)=72x24x=48*4x=8

第二步8-4x-8=x+1第三步5x=-1x=-1/5

根据题意知：X/3＝Y/4＝Z/5设X/3＝Y/4＝Z/5＝K则X＝3K,Y＝4K,Z＝5K所以(X+Y)/(X-2Y+3Z)＝(3K＋4K)/(3K－2*4K＋3*5K)＝7K/(10K)＝7/10

x/30-2=x/35等式分母同时乘以2107x-420=6x7x-6x=420x=420

两边乘4x-4x=x-2x-x+4x=24x=2x=2÷4x=2分之1

原方程可化为：x(1/1×2+1/2×3+1/3×4+...+1/2005×2006)=2005这里面需要用到小学奥数的裂项相消：x(1-1/2+1/2-1/3+...-1/2005+1/2005-1

1/(x-1)+1/(x-4)-[1/(x-2)+1/(x-3)]=0通分(2x-5)/(x²-5x+4)-(2x-5)/(x²-5x+6)=0(2x-5)[1/(x²-

4/(x-1)-1/(2x-1)-2=4(2x-1)/(x-1)(2x-1)-(x-1)/(x-1)(2x-1)-2(x-1)(2x-1)/(x-1)(2x-1)=(8x-4-x+1-4x²

再答：答案1/4

x/2-x/3=163x-2x=96x=96

84/4/2=84/8

x除以5加x除以2等于8.4同乘以102x+5x=847x=84x=12

(2X-1)除以4等于2.

x+x/2+x/3=5511x/6=55x=30

化成小数0.25x+0.4x=1.30.65x=1.3x=1.3÷0.65x=2

3x除以4等于2y除以5两边乘以4/3左边=x右边=y*2/5*4/3=y*8/15所以x除以y等于8除以15

-9除以x等于?

负九分之x