7.6x-1.3x=12.6
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3x=12.6x=4.2
1.3x+0.5x=6.5+0.71.8x=7.2x=4
0.5x-0.7=6.5-1.3x0.5x+1.3x=6.5+0.71.8x=7.2x=7.2÷1.8x=4
7.4x+12.6x=17620x=176x=176/20x=8.8
(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
5.5x-1.3x=12.64.2x=12.6x=3
解(1)x-0.75x=120.25x=121/4x=12x=12×4x=48(2)2.8x+x=7.63.8x=7.6x=7.6÷3.8x=2(3)2.36x+2.64x=185x=18x=18÷5
(4.5-x)*7=17.54.5*7-7x=17.54.5*7-17.5=7x7x=14x=2(5.5-1.3)x=12.64.2x=12.6x=30.8x=10.5-0.5*130.8x=4x=5
4(x+0.3)=4.8x+0.3=1.2x=1.2-0.3x=0.93*0.7+4x=6.52.1+4x=6.54x=6.5-2.14x=4.4x=1.15.5x-1.3x=12.64.2x=12.
133.6X=84X=2.5左边=24*2.5+9.6*2.5=84=可边26.7X=33.5X=5左边=14.3*5-7.6*5=33.5=右边35X=70X=14左边=7*14+8*14-10*1
移项得:5x+1.3x=6.5+0.7,合并同类项得:6.3x=7.2,化系数为1得:x=87.
0.3+0.3x=0.39x=0.32x-1.5x=7.6xx=00.36x÷0.3=1.2x=16(x+1.2)=18.6x=1.97x+2x=8.1x=0.9(x-5)÷3=1.7x=10.15(
17.6x-3.6x(6x-5)=4;分解等式:4x+3.6x-3.6x(6x-5)=4,进一步得:4(x-1)+3.6x(1-6x+5)=0,再合并得:4(x-1)+9.6x(1-x)=0;解得x=
2.5x-2.4=1.3x2.5x-1.3x=2.41.2x=2.412x=24x=24/12x=2再问:还有一个,12y=7.6加8y,y是多少再答:12y=7.6加8y12y-8y=7.64y=7
X=65/11约等于5.91
#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
3x一1.5X+0.3x=12.61.8x=12.6x=7
x=根号下130/2或-根号下130/2
2x等于x+15x等于15