ldcf.net
当前位置:首页 >> %0.3x=6解方程 >>

%0.3x=6解方程

-0.3x=6解方程 解:原方程即: 0.3x=-6 x=-6÷0.3 x=-20 把x=-20代入原方程检验, -0.3x(-20) =6

6.3÷0.3x=7 6.3=7x0.3x 6.3=2.1x x=6.3/2.1 =3

(1)0.3x+90%=54,0.3x+90%-90%=54-90%, 0.3x=53.1, 0.3x÷0.3=53.1÷0.3, x=177;(2)12-5x=6.5, 12-5x+5x=6.5+5x, 5x+6.5=12,5x+6.5-6.5=12-6.5, 5x=5.5, 5x÷5=5.5÷5, x=1.1;(3) 2 3 x- 1 2 x=42, 1 6 x=42, 1 6 x÷ 1 6 =42÷ 1...

1.5x=6 x=4

0.7x+0.3x=9 解:(0.7+0.3)x=9 x=9

0.3x=45 解:x=45÷0.3 x=150

x=2.6十0.3x x-0.3x=2.6 (1-0.3)x=2.6 0.7x=2.6 x=2.6/0.7 x=26/7

0.6x-0.3x=0.78 0.3x=0.78 x=0.78÷0.3 x=2.6

3.3+70%x=0.3x 3.3+0.7x=0.3x 0.7x-0.3x=-3.3 0.4x=-3.3 x=-8.25

x-0.3x=16.59 解 0.7x=16.59 x=16.59/0.7 解得x=23.7

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