Question

大括号x+y/2+x-y/3=11/6 4(x+y)-5(x-y)=7 快

Answer 1

(x+y)/2+(x-y)/3=11/6,4(x+y)-5(x-y)=7

令x+y=a,x-y=b

{a/2+b/3=11/6

{4a-5b=7

整理得：

{3a+2b=11

{4a-5b=7

解得：a=3,b=1

{x+y=3

{x-y=1

解得：x=2,y=1