Question

1.

The graph of x+y= 4 is shown.
Add y = x+ 2 to the same coordinate plane.
What is the solution to this system?

Answer 1

Explanation:

we use the second equation to substitute in the first :

x + (x + 2) = 4

2x + 2 = 4

2x = 2

x = 1

y = x + 2 = 1 + 2 = 3

the solution is the crossing point of both lines : (1, 3)