It’s for Plato! 20 points!!

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

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