x-(1/2x+20000)-{3/4[x-(1/2x+20000)]-10000}=205000 x=?
问题描述:
x-(1/2x+20000)-{3/4[x-(1/2x+20000)]-10000}=205000 x=?
答
x-(1/2x+20000)-{3/4[x-(1/2x+20000)]-10000}=205000 1/2x-20000-{3/4[x-(1/2x+20000)]-10000}=205000 1/2x-3/4[x-(1/2x+20000)]+10000=225000 1/2x-3/4[x-(1/2x+20000)]=215000 1/2x-3/4x+3/4(1/2x+20000)=215000 -...