Question 279975
Let {{{x}}} = original price
After the 1st discount, it cost
{{{x - .1x = .9x}}}
After the 2nd discount, it costs
{{{.9x - .15*(.9x) = .9x - .135x}}}
{{{.9x - .135x = .765x}}}
{{{.765x = 306}}}
{{{x = 400}}}
The original cost was $400