75%x-45%x=4.9
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/10 19:42:19
X-25%X=300.75X=30X=30/0.75X=402X+30%X=9.22.3X=9.2X=9.2/2.3X=475%X-45%X=120.3X=12X=12/0.3X=40X+120%X=
(x+8-60%x)\60%x=75%(x+8-0.6x)/(0.6x)=0.75←←←(把百分数变成小数)0.4x+8=0.45x←←←(两边同时乘以分母,并化简左边)0.05x=8←←←(移项)x
两边同时乘以55x+2x=2257x=225x=225/7
1.x-25%x=30X=30/0.75=402.2x+30%x=9.2x=9.2/2.3=43.75%x-45%x=12x=12/0.3=404.x+120%x=33x=33/2.2=15再问:能讲
(X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9再问:请问X(X+2)=99解为什么就等于9了呢没看懂再答:换成算术法你就明
X+1/4X=75,X=60
(1)4.9+0.5x=5.6, 4.9+0.5x-4.9=5.6-4.9, &nb
x÷0.8-x=45x-0.8x=45×0.8(1-0.8)x=360.2x=36x=36÷0.2x=180
x+20+3*20=3xx+20+60=3x3x-x=802x=80x=40x÷75+x÷60=45两边同时乘以3004x+5x=135009x=13500x=1500
把括号拆了5x=5x=1
分子分母同时乘以180有:9x=4(3x-75)然后有9x=12x-300然后有300=3x所以结果为x=100
x-75%x+85=6/7xx-3/4x+85=6/7xx/4+85=6/7x两边同时乘以28得7x+2380=24x24x-7x=238017x=2380x=2380÷17x=140明白请采纳,有新
0.25x=1x=4x-45%=1.1x=0.45+1.1x=1.55120%x-x=2.40.2x=2.4x=12
2x-1.5x=750.5x=75x=15013X0.8-2x=4.910.4-2x=4.92x=10.4-4.92x=5.5x=2.75
(x-5)+(x-3)+x+(x+3)+(x+5)=455x=45x=9
#includesintjiesheng(intn)//用于计算阶乘如:3!{if(n=1)rerunn;returnn*hh(n-1)}doubledigui(intn,intx)//用以计算y=x
54+4X=75+X移项得4x-x=75-543x=21x=7土豆团邵文潮为您答疑解难.如果本题有什么不明白可以追问,
2x等于x+15x等于15
75x=(45-x)×6075x=45×60-x×6075x=2700-60x75x+60x=2700135x=2700x=2700÷135x=20