解方程组:2(x-y)⼀3-x+y⼀4=-1 ,6(x+y)-4(2x-y)=16

2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
2024-12-30 17:06:29
推荐回答(2个)
回答1:

2(x-y)/3 - x+y/4=-1 (1)
6(x+y)-4(2x-y)=16 (2)
解:
(1)方程两边同乘以12得
8(x-y)-3(x+y)=-12
合并同类项得
5x-11y+12=0 (3)
(2)合并同类项得
10y-2x-16=0 (4)
(3)*2+(4)*5得
28y-56=0
所以 y=2
把y=2代入(1)得
x=2

回答2:

x=4/5, y =44/25