Question

If (x + yi) + (2(x + yi) + 3i) = 9, what is x + yi?

Answer 1

open the bracket, what do you have?

Answer 2

IM LOST

Answer 3

(x+yi) + 2(x+yi) +3i =9, right?

Answer 4

distribute the 2 in x + yi

Answer 5

now, if 1(cstitt) + 2 (cstitt) =? (cstitt)??
or 1cookie + 2 cookies = ? cookies?

Answer 6

3?

Answer 7

SO ANSWER WILL BE 3+i?

Answer 8

yes!! so the first 2 terms is 3(x+yi) ,
the last term from the left hand side is till 3i
total, you have 3(x+yi) +3i =9
got me so far?

Answer 9

yep thaank youu

Answer 10

now, divide both sides by3,you get (x+yi) +i =3 ok?

Answer 11

minus i (-i) both sides, you have the answer for (x+yi) = 3-i