Question

Find x and y.

6x+ 7iy= 18 -21i
a.
x = 3, y = -3
c.
x = -5, y = 6
b.
x = 8, y = -1
d.
x = 6, y = 18

Answer 1

A here x is dependent and y is independent

B first

x-6

y-1

second

x-12

y-2

third,

x-18

y-3

C 6x+y

Explanation:

Answer 2

In this type of situation the question gets divided into two parts;
6x=18 and 7iy=-21i
Now x=18/6 (Dividing both sides by 6) and y=-21i/7i (Dividing both sides by 7i)
x=3 and y=-3
Therefore option a is the answer.