Can someone me answer this? (q. 22)

1: by seeing where they intersect.

2: an ordered pair, the solution to a system of equations is always an ordered pair. in this case (-1,-2)

it is negative 1, negative two. the solution is where the two lines cross. always write the x and y coordinate. a good way to remember this is you have to walk into the elevator before you go up or down. so count where on x it is and where on y it is. never just write the x coordinate, even if the other coordinate is zero