Hi, i was just wondering if anyone could help me out with these two math questions from my homework.

question 1.) solve the system of equations

x+3y-z=-14

7x+6y+z=1

4x-2y-5z=11

question 2.)a tain leaves toronto for montreal at the same time as another train leaves montreal for toronto. the cities are 500km apart. The trains pass each other 2 hours later. the train leaving montreal is travelling 50km/h faster than the one leaving from toronto. at what distance away from toronto do the trains pass each other?