El grado de un término o expresión algebraica se determina en relación

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?