ldcf.net
当前位置:首页 >> 求未知数X:①0.6÷X=12:5 ... >>

求未知数X:①0.6÷X=12:5 ...

(1)12÷(0.5x-1)=6,12÷(0.5x-1)×(0.5x-1)=6(0.5x-1), 6(0.5x-1)=12, 6(0.5x-1)÷6=12÷6, 0.5x-1=2, 0.5x-1+1=2+1, 0.5x=3, 0.5x÷0.5=3÷0.5, x=6;(2)12:x= 1 8 : 1 4 , 1 8 x=12× 1 4 , 1 8 x=3, 1 8 x÷ 1 8 =3÷ 1 ...

(1)4÷0.6x=100 4÷0.6x×0.6x=100×0.6x 60x=4 60x÷60=4÷60 x=115;(2)13:4=14:x 13x=4×14 13x=1 13x×3=1×3 x=3.

x÷5/12=4/9 x=4/9×5/12 x=5/27

①0.8×34-3x=0.2, 0.6-3x=0.2, 0.6-3x+3x=0.2+3x, 0.6=0.2+3x, 0.6-0.2=0.2+3x-0.2, 0.4=3x, 0.4÷3=3x÷3, 215=x, x=215;②312:0.4=x:117. 0.4x=312×117, 0.4x=72×87, 0.4x=4, 0.4x÷0.4=4÷0.4, x=10;

(1)X-85%X=1.05, (1-0.85)X=1.05, 0.15X=1.05, 0.15X÷0.15=1.05÷0.15, X=7;(2)X:514=21:58, 58X=21×514, 58X=152, 58X÷58=152÷58, X=152×85, X=12;(3)4.5X-0.5=8.5, 4.5X-0.5+0.5=8.5+0.5, 4.5X=9, 4.5X÷4.5=9÷4.5, X=2.

*是不是等号?

等一下我谢谢非常感谢。

(1)16+5%x=24 16+0.05x=2416+0.05x-16=24-16 0.05x=80.05x÷0.05=8÷0.05x=160;(2)x-0.4x=0.72 0.6x=0.720.6x÷0.6=0.72÷0.6 x=1.2;(3)x: 2 7 =14: 2 5 2 5 x=14× 2 7 x=4÷ 2 5 x=10.

(o)o0:x=06&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;06x=o0&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;06x÷06=o0÷06&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6;&nbs6; x=v9;(o)x:0.o=0.v&nbs6;...

x=5

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com