这是PREP MATH的175题，谁能帮忙翻译下

Joseph_lin · 发表于 2011-5-5 00:01:34

Before being simplified, the instructions for computing income tax in Country R were to add 2 percent of one's annual income to the average (arithmetic mean) of 100 units of Country R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax, in Country R's currency, for a person in that country whose annual income is I ?

求翻译，谢谢

sdcar2010 · 发表于 2011-5-5 08:49:55

LZ, you can google for answer to this question within this forum.

1/2(100+I/100)+2I/100=50+I/40

What it says is that: add A to (the average of B and C).

A = 2 precent of one's income : 2% x L
B = 100 units of Country R's currency : 100
C = 1 percent of one's annual income : 1 x L

A + 0.5 ( B + C ) = 2% x L + 0.5 x ( 100 + 1% L ) = 50 + 2.5% L

Joseph_lin · 发表于 2011-5-5 21:42:41

多谢

这是PREP MATH的175题，谁能帮忙翻译下

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