Question

(x+y)/2+(x-y)/3=1又5/6 (1)

Answer 1

(x+y)/2+(x-y)/3=1又5/6 (1)x30：15(x+y)+10(x-y)=55

4(x+y)-5(x-y)=7 (2)x2：:8(x+y)-10(x-y)=14 相加

23(x+y)=69

x+y=3

5(x-y)=4x3-7=12-7=5

x-y=1

x=(3+1)/2=2

y=(3-1)/2=1