解二元一次方程组2x+y=2x-2y=3x+y=365x-6y=12a-b=82x+3y=-59s+7t=13-x+y=5x+2y=6x+2y=502x-6y=103a+2b=53x-4y=1812s-9t=-13y-2/x+1=02y-2/x+3=0以上都是方程组都用代入法来解!详细的步骤全部要!快点急!先给20分弄

Question

解二元一次方程组
2x+y=2 x-2y=3 x+y=36 5x-6y=1 2a-b=8 2x+3y=-5 9s+7t=13
-x+y=5 x+2y=6 x+2y=50 2x-6y=10 3a+2b=5 3x-4y=18 12s-9t=-1
3y-2/x+1=0
2y-2/x+3=0 以上都是方程组都用代入法来解!详细的步骤全部要!快点急!先给20分弄完好的再加!另外再加一道英语:There is much wind in South Korea today(同义句）.
, in South Korea today.

Answer 1

2x+y=2
-x+y=5 y=x+5
代入上面 2x+x+5=2 x=-1 y=4
后面的几个都差不多,不过有的以倍数代入而已
South Korea have much wind today~