Please Help! I will give you the brainiest and a lot of points! Answer MUST be a simplified fraction or integer

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

Clarence wants to buy a new car. he finds an ad for a car that costs 27,200 dollars. suppose his local sales tax is 7%. -how much would he have to pay? -what is the cost of the car including tax? -if clarence has 29,864 saved, can he pay cash to buy the car?

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30