knrt.net
当前位置:首页 >> 负x+3÷2x=多少 >>

负x+3÷2x=多少

x+3÷2x-3=3 解:x+1.5x-3=3 2.5x-3=3 2.5x=3+3 2.5x=6 x=6÷2.5 x=2.4

解 [(x+3)²+(x+3)(x-3)]÷2x =[x²+6x+9+(x²-9)]÷2x =(2x²+6x)÷2x =x+3 [(2x+y)²-(2x+y)(2x-y)]÷2y-1/2y =[4x²+4y+y²-4x²+y²]÷2y-1/2y =[4y+2y²]÷2y-1/2y =2+y-1/2y =2+1/2y (a²b-2ab...

你好,很高兴为你解答 括号里的3+x括起来乘2÷2+2x÷2=10 (3+x)+x=10 2x=7 X=3.5 满意采纳哦!!

(2x-1)÷(x+2)≥-3, (2x-1)÷(x+2)+3≥0, (2x-1+3x+6)÷(x+2)≥0, (5x+5)÷(x+2)≥0, x<-2,或x≥-1, 解集是x∈(-∞,-2)U[-1,+∞)

3+x+x=10 2x=10-3 2x=7 x=3.5

3(X+1)÷(2X–4)= 6 3(x+1)=6(2x+4) 3x+3=12x+24 3x-12x=24-3 -9x=21 x=21/-9=-7/3

X=1或-1 代入上式 得0 题目错了吧

3x+x÷3=180 两边同乘以3,得 9x+x=180×3 10x=540 x=54

3-x 2x-4 ÷(x+2- 5 x-2 ) = -(x-3) 2(x-2) ÷ x 2 -4-5 x-2 = -(x-3) 2(x-2) ? x-2 (x+3)(x-3) =- 1 2x+6 .

|x-3|+(y+2÷5)²=0,求y的x次方的值|x-3|+(y+2÷5)²=0则x-3=0x=3y+2÷5=0y=-2/5y的x次方=(-2/5)的3次方=-8/125

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