Question

What is that graph of x + y = 4

Answer 1

Answer:

Let x = 2 ,

x + y = 4

2 + y = 4

y = 4 - 2

y = 2

Let y = 1

x + y = 4

x + 1 = 4

x = 4 - 1

x = 3

hope this helps you ☺