ldcf.net
当前位置:首页 >> x十0,2x一0,9=9,6怎么解方程 >>

x十0,2x一0,9=9,6怎么解方程

2x+6x-60=260 8x=320 x=40

X/0.7=0.7 x=0.49 2X-5.7=9.6 x= 7.65 (X-0.7)*0.8=2.8 x=2.24 0.56*3.68+6.32*0.56=0.56*(3.68+6.32)=0.56*10=5.6 7.8*10.1=7.8*(10+0.1)=78+0.78=78.78 1-十四分之八=七分之三 2.6/0.31=260/31=8又31分之12 83.2/9.3=8又93分之88 8.23/1.6=0.5...

3l2x+1l-9=0 3l2x+1l=9 |2x+1|=9÷3 2x+1=3 2x=2 x1=1 2x+1=-3 2x=-4 x2=-2

1)1.5x+3x=6 4.5x=6 x=6/4.5 =4/3 2)2x-1.5x=1.9 0.5x=1.9 x=1.9/0.5 =3.8 3)0.54 x-4.5*6=45 0.54x-27=45 0.54x=45+27=72 x=72/0.54 =400/3 4)7x-0.4=0.3 7x=0.3+0.4=0.7 x=0.7/7 =0.1 5)8x+5x=65 13x=65 x=65/13 =5 6)0.9x-3*1.2=7.2...

(1)4x-3×9=29 4x-27=29 4x-27+27=29+27 4x÷4=56÷4 x=14;(2)6.2x-2x=42.36 4.2x=42.36 4.2x÷4.2=42.36÷4.2 x=10670;(3)13(x+5)=169 13(x+5)÷13=169÷13 x+5-5=13-5 x=8.

4.8x-x=1.4 解:3.8x=1.4 x=1.4÷3.8 x=7/19 8.9-X=6.895 解:x=8.9-6.895 x=2.005 (2X-16)×5=1 解:2x-16=1÷5 2x-16=0.2 2x=0.2+16 2x=16.2 x=16.2÷2 x=8.1

2x+1.2=9 2x=7.8 x=3.9

2.4/0.3=2x/0.5 解:2x×0.3=2.4×0.5 0.6x=1.2 x=1.2÷0.6 x=2

x+15=52 x=52-15 x=37 x-46=90 x=90+46 x=136 0.2x=14.2 x=14.2/0.2 x=71 x/8=15 x=15*8 x=120

将2x=y代入x-y-9+3a=0,得 x-2x-9+3a=0 => x=3a-9 根据题目,则y=6a-18 将x=3a-9, y=6a-18代入x+y-6=0,得 (3a-9)+(6a-18)-6=0 => 9a-33=0 => a=11/3 当a=11/3时,方程组的解为2x=y

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