Question 132663
Call the original price {{{p}}}
With the 1st discount, the instrument sells for {{{p - .1p = .9p}}}
After the 2nd discount, it sells for {{{.9p - .15(.9p)}}}
{{{.9p - .15(.9p) = .9p - .135p}}}
{{{.9p - .135p = .765p}}}
{{{.765p = 306}}}
{{{p = 400}}}
The original price of the flute was $400
check:
{{{p - .1p = .9p}}}
{{{400 - .1*400 = 360}}}
{{{.9p - .135p = .765p}}}
{{{360 - .135*400 = .765p}}}
{{{360 - 54 = 306}}}
{{{306 = 306}}}
OK