Question

解方程组,全题看补充5 4——+ ------=2x+1 y-2{7 3 13-----+ -----= -----x+

Answer 1

5/(x+1)+4/(y-2)=2

7/(x+1)+3/(2-y)=13/20

*7-*5

28/(y-2)+15/(y-2)=14-13/4

y-2=4

y=6

代入得

5/(x+1)+4/4=2

x+1=5

x=4