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Mathematics 18 Online
OpenStudy (anonymous):

HELP PLEASEEEEEEE! okay this is my final question but I am stuck on it! help? If ((x+yi)/(1+i))=(7/(7+i)) , where x and y are real, what is the value of x+y?

OpenStudy (anonymous):

cross multiply to get (x + yi)(7 + i) = 7(1 +i)

OpenStudy (anonymous):

multiply these out and use the fact that the real part both sides must be the same and the imaginary part both sides must be the same. both x, y are fractions with denominator 25

OpenStudy (anonymous):

thank you sooooo much!

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