Choosing Solutions plz help me no links

If 3x+8=3x+8 is it one solution or no solution

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?