7x除以1/3等于3/5-搜答案-搜狗做题网

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

x-2除以6-x+2除以3等于1+x-1除以2两边乘6x-2-2(x+2)=6-3(x-1)-x-6=9-3x3x-x=9+62x=15x=7.5

x/6-3=x/7+542(x/6-3)=42(x/7+5)7x-126=6x+2107x-6x=210+126x=336

3(5x+3)+2(1+7x)x=-7

x=(1/5+3/2)÷4/5=17/10*5/4=17/8=2又1/8

是1/x+1/y=5么?题不对吧

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-

7X除以3等于8.

依题有7X/3=8.197X=24.57X=3.51

91除以x等于1点3

91/x=1.3x=91/1.3x=70

3x÷1/5=2/73x=10/7x=10/21

x＝3/5×7/5＝21/25

(X+1)除以（x+2）加上（x+6）除以（x+7）等于（x+2）除以（x+3）加上（x+5）除以（x+6）[1-1/(x+2)]+[1-1/(x+7)]=[1-1/(x+3)]+[1-1/(x+6)

x除以3等于2.

x等于2.1除以3

x+5除以x+3加上x+11除以x+9等于x+7除以x+5加上x+9除以x+7即（x+5）/（x+3）+（x+11）/（x+9）=（x+7）/（x+5）+（x+9）/（x+7）,分析后,可知分子=分母

7x÷(1/3)=57x=5×1/37x=5/3x=5/3÷7x=5/21

3x除以1/5等于4/3

3x×5=4/33x=4/15x=4/45

再答：再问：3(x-2)＝8.4(x-1.8)除以4＝2.50.4x-2乘11＝6全部解方程要过程

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

3/5除以6/7X等于X除以5/43/5÷6/7x=x÷5/43/5*5/4=6/7x*x3/4=6/7x^2x^2=3/4÷6/7x^2=3/4*7/6x^2=7/8x=根号7/2根号2x=根号14