ldcf.net
当前位置:首页 >> 3(x一4)二5(x十30) >>

3(x一4)二5(x十30)

3-2x=1.86 -2x=-1.14 x=0.57 5(x+4)=10.5 x+4=2.1 x=-1.9 (30-3x)÷2.4=10 30-3x=240 -3x=210 x=-70

4/5x一30=3/4x一30/4 4/5x一3/4x=30一30/4 1/20x=90/4 x=450

(x+30)÷2=80 x+30=80×2 x+30=160 x=160-30 x=130

(1)20%X=10,20%X÷20%=10÷20% x=50;(2)95%X-65%X=9, 30%x=9, 30%x÷30%=9÷30%, x=30;(3)50%X-30%X=5.5,20%x=5.5, 20%x÷20%=5.5÷20%, x=27.5;(4)X+350%X=90,450%x=90,450%x÷450%=9÷450%, x=2;(5)12X+4X=128, 16x=128, 1...

(1)移项合并得:9x=6,解得:x=23;(2)去括号得:4x-60+3x=3,移项合并得:7x=63,解得:x=9;(3)去分母得:5(x-1)=20-2(x+2),去括号得:5x-5=20-2x-4,移项合并得:7x=21,解得:x=3;(4)方程整理得:10x+302-4x?105=-2.5,去分母...

1/3一(x十1/5)=1/10 解 1/3一(x十1/5)=1/10 1/3一x—1/5=1/10 一x=1/10 +1/5—1/3 一x=3/30 +6/30—10/30 x =-1/30

(1)去括号得:4x-60+3x=3,移项合并得:7x=63,解得:x=9; (2)方程变形得:10x+302-4x?105=-52,去分母得:50x+150-8x+20=-25,移项合并得:42x=-195,解得:x=-6514.

① 20%x=0.7-0.5 0.2x=0.2 x=1 ②0.95x=95 x=100 ③70%x=10 x=10÷0.7 x=100/7 ④ 32%x=40 x=40÷0.32 x=125

#includeint main(){ double x1=2,x2=4; double y1=3,y2=5; double temp1,temp2; double sum = 0; int i; sum += (x1/y1); for(i=0;i

4分之3(465-x)-3分之2x=30 (3/4)(465-x) - (2/3)x =30 9(465-x) - 8x =360 4185-17x=360 17x=3825 x=225

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