0=-0.2x2 2x 1.7
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化简就是3-7x=0.2,那7x=2.8,x=0.4
7/8*(X-3/7)/0.625+0.2=17/8*(X-3/7)/0.625=0.8X-3/7=0.8*0.625*8/7X-3/7=4/7X=1
X-0.2/X-1.52-0.4=9/77(X-0.2)=9(X-1.52-0.4)9X-17.18=7X-1.42X=15.78X=7.89
20*6-144/4=841.4-(1.4/7+0.2)=1
在x+2y=0上任取一点,比如原点他到2x+4y-7=0的距离就是两平行线之间的距离所以距离=|0+0-7|/√(2²+4²)=7√5/10
=if(and(f50,G50,J50,H50),M5/F5*0.2+N5/G5*0.2+Q5/J5*0.2+O5/H5*0.2,"")再问:根据大神你提供的公式,最后显示出来是空白,我想需求%再答:
0.2x+0.2*15=0.5-x/3+7/30.2x+x/3=0.5+7/3+3(8/15)x=35/6x=35/6÷8/15x=175/16
1.化简比6分之1:5分之1=(5:6)50:10分之5=100:13分之2:8分之7=16:212.求比值15.7:5=15.7/5=3.140.2:7分之1=0.2*7=1.40.31:2=0.3
x/7-(0.17-0.2x)/0.03=10.03x-7*(0.17-0.2x)=0.210.03x-1.19+1.4x=0.211.43x=1.4x=0.98
用括号很容易就可以得出0*后面一串=0(0.2/0.2+0.2)*(0.2-0.2)=0如果不能用括号,不知这样可否,将0.2-0.2上移成幂指数0.2-0.20.2-0.2/0.2=0
因为sina+cosa=√2sin(α+π/4)又因0
6/7*(7/6)=3/5*(5/3)=9*(1/9)=0.2*(5)=1
7x+3*1.4x=0.2*567X+4.2X=11.211.2X=11.2X=1
7/8*(X-3/7)/0.625+0.2=17/8*(X-3/7)/0.625=0.8X-3/7=0.8*0.625*8/7X-3/7=4/7X=1
0.2分之0.1x+0.05-0.5分之0.2x-0.05+5/4=05(0.1x+0.05)-2(0.2x-0.05)+1.25=00.5x+0.25-0.4x+0.1+1.25=00.1x+1.6
(0.2-0.2)×(0.2+0.2÷0.2)=0
x-1/5*x-8/5=04/5*x=8/5x=2再问:能不能说的明白点啊,我小学生啊,帮帮我再答:x-0.2x-1.6=00.8x=1.6x=2再答:x-0.2x-1.6=00.8x=1.6x=2
sina+cosa=-0.2两边平方,1+2sinacosa=0.04(sina-cosa)^2=1-2sinacona=1.96sina-cosa=1.4得到,sina=0.6,cosa=-0.8t
5x²-0.2=05x²=1/5x²=1/25x=±1/5