Combine like terms to make an expression with fewer characters.
3(x+4)-2(x+4) *

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?