The original price of the skies that Hiroshi bought is required.
The original price of the skies was $110.
Let [tex]x[/tex] be the original price of the water ski.
The sales price of the ski is two thirds the original price.
The gift certificate reduces the cost by a further $25 .
Total cost of the ski is $115.
So, the equation will be
[tex]\dfrac{2}{3}x-25=115\\\Rightarrow \dfrac{2x-75}{3}=115\\\Rightarrow 2x-75=345\\\Rightarrow x=\dfrac{345+75}{2}\\\Rightarrow x=110[/tex]
Hence, the original price of the skies was $110.
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