HELP! No clue what to do, pls help. If decided to help, please show your work. Thank you! ! ! Question in the picture btw.

Solve: 3x+y=6 4x-2y=18 show all work !

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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. how many hours after the truck's departure will the two meet?