What is the answer to this equation 6+7x=86 please help me

Can someone me with this problem i don't understand i need

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

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