第1个回答 2014-01-12
1、150x/(1-60%)=150(x+20)/(1-15%)x/(1-60%)=(x+20)/(1-15%)x/0.4=(x+20)/0.85
0.85x=0.4(x+20)
0.85x=0.4x+8
0.45x=8
x=8/0.45
x=16/9
2、48+20-[12000*(1-20%)/150]=48+20-[12000×80%/150]
=68-[9600/150]
=68-64
=4
第2个回答 2014-01-12
150x/(1-60%)=150(x+20)/(1-15%)
X/0.4=(X+20)/0.85
0.85X=0.4(X+20)
0.85X=0.4X+8
0.45X=8
X=160/9
48+20-[12000*(1-20%)/150]
=68-(12000*0.8/150)
=68-9600/150
=68-64
=4
第3个回答 2014-01-12
(1)150x/0.4=150(x+20)/0.85 0.4(x+20)=0.85x 0.4x+8=0.85x 0.45x=8 x=160/9
(2)=68-(12000*0.8/150)
=68-(9600/150)
=68-64=4
第4个回答 2014-06-19
1两边除150 x/(1-60%)=(x 20)/(1-15%)
x/(0.4)=1(x 20)/(0.85)两边除0.05
x/(8)=150(x 20)/(17)交叉相乘
17x=8x 16
x=160/9
2 68-(12000×0.8/150)=68-9600/150=4