Question 412947
Let {{{x}}} = number of cartons she bought
given:
{{{100*(x - 15) - 50x = 2250}}} (in cents)
{{{100x - 1500 - 50x = 2250}}}
{{{50x = 3750}}}
{{{x = 75}}}
She bought 75 cartons
check:
{{{100*(75 - 15) - 50*75 = 2250}}}
{{{6000 - 3750 = 2250}}}
{{{2250 = 2250}}}
OK