Two trains are moving towards each other. One train moves at a speed of 50 mph, and the other train travels at 70 mph. How soon will they meet, if originally the distance between them was 390 miles?

3 hours and 15 minuets

Step-by-step explanation:

First you add the speeds together

120 mph

Second you divide 390 by 120

390/120=3.25

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3