How to change 2x+3=x+x+3 to where it has no solution?

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

I’m really confused and need your assist me with this question i’ve never been taught

Use this graph to find the cost of 6 show tickets