M=n give reason
2)x=y. give reason
3) y+n = x+m give reason​

--> Corresponding angle

--> Vertically opposite

Step-by-step explanation:

Given

The attachment

Required

State the reason for the given statements

m = n

m and n are corresponding angles.

So:

x = y

x and y are vertically opposite angles

So:

In (b)

Add m to both sides

In (a)

So, substitute n for m on the left hand side

4 + 5 7/9= 9 7/9

step-by-step explanation: