Dot sells tshirts ($2) and shorts ($4). total sales were $600. people bought 4 times as many t-shirts as shorts. how many t-shirts and shorts were sold?

First, you would need to set up the equation. second, you would need to see that since she sells four times as many shirts, the number of shorts is equivalent to 4(2x) which would be 8x. since the number of shorts is already 4x, you would add 8x+4x to get 12x. from there you divide 600/12 to get 50, which is the amount of shorts sold. to get the number of shirts, you simply multiply by 4 to get 200 shirts

at the beginning you need to set up the equation like this:

2x+4x=600
where x is the number of shorts
now you just multiply the 2x by four and evaluate