www.5129.net > (1+x):(1+x+30%)=5:4

(1+x):(1+x+30%)=5:4

5.2%=60%-30%-[(1+X)/X]*8%*(1-40%) 0.052=0.3-[(1+

6分之x-4分之30-x=5 两边乘12 2x-3(30-x)=60 2x-90+3x=60

解:1、原式为x²-8x+16+5-30=0,x²-8x-9=0

2/3+x-1x/5=30 4x/5=30-2/3 x=88/3X5/4 x=110/3 x

(1)解:去括号得,3x37x35=30x+30,移项,得3x7x30x=30+3+35,

(1)移项得:2t-3t=5+4;合并同类项得:-t=9,系数化1得:t=-9;(2)去括号得:4-

计算乘法 30x(1+6%) =30x1.06 =31.8

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