El triple de un número más la mitad de ese número es igual a 14. ¿Qué ecuación representa a la situación presentada?

Which of the choices shown could be used to prove that aacp=abcp ?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

During how many months was the difference between the number of days with homework and with no homework greater than 6?