ppts.net
当前位置:首页>>关于x-0点52x等于9.6解方程的资料>>

x-0点52x等于9.6解方程

x=5500

(1)20.52x-(1-0.52)x=80 20.52x-0.48x=80 20.04x=80 x=2000/501 (2)43x+7=32-2x 43x+2x=32-7 45x=25 x=5/9 (3)2(7x-5)=3 7x-5=1.5 7x=6.5 x=13/14

去分母得:2(x-1)(x+1)-2x(1-x)=5x2-5x,去括号得:2x2-2-2x+2x2=5x2-5x,整理得:x2-3x+2=0,即(x-1)(x-2)=0,解得:x1=1,x2=2,经检验都是分式方程的解.

错了吧,应该是 53x+47y=112 (1) 47x+53y=88 (2) (1)+(2) 100x+100y=200 x+y=2 53x+53y=106 (3) (3)-(1) 6y=-6 y=-1 x=2-y=3

解:(32-x)(20-x)=540去括号得640-52x+x^2=540化简得x^2-52x+100=0及(x-50)(x-2)=0解得x=50或x=2

(X-50)[200+2(70-X)]=4500 (X-50)[340-2X]=4500 -2X^2+440X-1700=4500 X^2-220X+3100=0 (X-110)^2=8000 X=±40√5+110 (30-2X)(20-2X)=(1-3/8)×30×20 600-100X+4X^2=375 4X^2-100X+225=0 4(X-12.5)^2=625-225 X=12.5±10=22.5或者2.5 (-1/10X+30)(X...

根据方程组的特点,此方程组可变为4x+3y=5①4x?2y=30②,①-②,得y=-5,代入①,得4x+3×(-5)=5,x=5.所以方程组的解为x=5y=?5.

7(2x-1)-3(4x-1)=4(3x+2)-1; (5y+1)+ (1-y)= (9y+1)+ (1-3y); [ ( )-4 ]=x+2; 20%+(1-20%)(320-x)=320×40% 2(x-2)+2=x+1 2(x-2)-3(4x-1)=9(1-x) 11x+64-2x=100-9x 15-(8-5x)=7x+(4-3x) 3(x-7)-2[9-4(2-x)]=22 3/2[2/3(1/4x-1)-2]-x=2 1 2x-10.3x...

(1)2x-4×3=52, 2x-12=52, 2x-12+12=52+12, 2x÷2=64÷2,x=32;(2)x:1.2=3:4, 4x=1.2×3,4x=3.6, 4x÷4=3.6÷4,x=0.9.

x²-52x+100=0 x²-52x+100 =x²-52x+(52/2)²-(52/2)²+100 =(x-26)²-576=0 ∴(x-26)²=576 x-26=±24 x=50或x=2

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