A painting by Van Gough increased in value by 80% from year 1995 to year 2000. If in year 2000, the painting is worth $7200, what was its value in 1995?
Let x = the original value in 1995
Then, x + .8x = 7200
Therefore, x(1+.8) = 7200
1.8x = 7200
x = 7200/1.8 = $4000
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