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x-(1/2x+20000)-{3/4[x-(1/2x+20000)]-10000}=205000 x=?

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/06/07 16:07:53
x-(1/2x+20000)-{3/4[x-(1/2x+20000)]-10000}=205000 x=?
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
-1/4x+3/4(1/2x+20000)=215000
-1/4x+3/8x+15000=215000
1/8x=200000
x=1600000