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0.04x05+0.4x+1=0

0.04x²+0.4x+1=0 4x²+40x+100=0 x²+10x+25=0 (x+5)²=0 x=-5

如图,望采纳!

1、x+5分之x+2=1.6+2分之x-1 x+(x+2)/5=1.6+(x-1)/2 10x+2x+4=16+5x-5 12x+4=5x+11 7x=7 x=1 2、0.3分之0.4(x-3)-0.04分之0.1x-0.2=1-2分之x-1 0.4(x-3)/0.3-(0.1x-0.2)/0.04=1-(x-1)/2 4/3x-10-2.5x+5=1-1/2x+1/2 (4/3-2.5+1/2)x=1+1/2+10-5 -...

1、x+5分之x+2=1.6+2分之x-1 10x+2(x+2)=16+5(x-1) 10x+2x+4=16+5x-5 7x=15 x=15/7 2、0.3分之0.4(x-3)-0.04分之0.1x-0.2=1-2分之x-1 16(x-3)-3(10x-30)=12-6(x-1) 16x-48-30x+90=12-6x+6 8x=24 x=3 (1-5/20)÷(1/20+1/30)=9天 如有帮助,请采纳...

0.04/x=(1+1/4)/0.5 0.04/x=(1+1/4)×2 0.04/x=5/4×2 0.04/x=5/2 0.04×2=5x x=0.08/5 x=0.016

[(0.05+0.04)÷0.25-2/5]x125% =[0.09÷1/4-2/5]x125% =[0.09x4-0.4]x125% =[0.36-0.4]x125% =-0.04x1.25 =0.05 谢谢,请采纳

import java.util.Scanner;public class E011 { public static void main(String[] args){ System.out.print("请输入一个数:"); Scanner x = new Scanner(System.in); int n = x.nextInt(); double a = 0.0d; for(int i = 1 ; i

百分之一是0.01

x/0.8+(0.16-0.1x)/0.04=x/0.8+(1.6-x)/0.4=(x-3.2+2x)/0.8=(3.2-x)/0.8=1 3x-3.2=0.8, 3x=4 x=3/4

0.4×98

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