Question

If c-d = 7 and c = 3 - 4i, what is d?

Answer 1

A.-4-4i

Explanation:

You can just substitute c with 3-4i in c-d=7

so the equation now looks like this:

3-4i-d=7

Now move 3 and -4i to the other sides:

-d=4+4i

Divide by -

Which is -4-4i

So the answer is A.-4-4i

Hope this helps!