Question

Se (x+10i) - (3+yi)=1+i, então x+y vale:

Answer 1

(x+10i)-(3+yi)=1+i

x+10i-3-yi=1+i
x-3+10i-yi=1+i
x-3+i(10-y)=1+i

x-3=1
x=1+3
x=4

10-y=1
-y=1-10
-y=-9 (-1)
y=9


x+y
4+9
13


R: 13
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