Respuesta :

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.

Answer:

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

Step-by-step explanation: