Answer this plz .

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%.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

How do you do the foil method with polynomials?