Complex knowledge points of mathematics in senior two

First, you have to understand two things.

1 follows the principle that the real part is equal to the real part and the imaginary part is equal to the imaginary part in the complex equation. So what are the real and imaginary parts? That is, the part without I, such as x+y to the left of the equal sign and 2x+3y to the right of the equal sign in this question. The imaginary part is the part with I, such as y- 1 to the left of the equal sign and 2y+ 1 to the right of the equal sign in this question. So there are x+y=2x+3y, y- 1=2y+ 1.

2. To move an item is to move from one side of the equal sign to the other, and then change the sign.

So this problem is to solve the equation.

x+y=2x+3y，

y- 1=2y+ 1

After moving the project

x-2x=3y-y

y-2y= 1+ 1

arrange

-x=2y

-y=2

that is

y=-2