实数x,y满足条件:(x+y)+(y-1)i=(2x+3y)+(2y+1)i则x+y=_.
问题描述:
实数x,y满足条件:(x+y)+(y-1)i=(2x+3y)+(2y+1)i则x+y=______.
答
∵:(x+y)+(y-1)i=(2x+3y)+(2y+1)i,
∴
,解得
x+y=2x+3y y−1=2y+1
,
x=4 y=−2
∴x+y=2,
故答案为:2.