PLS HELP I HAVE ALOT TO ANSWER AND TY IF YOU DO!!

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Is the figure congruent? yes or no?

3x + 4y = 5 x- 3y = -7 solve by substitution