Question

Use addition to solve the linear system of equations.

Answer 1

??

Explanation:

Answer 2

Here, Equations are: x - y = 6
y = x - 4
x - y = 4

Here, we can see L.H.S of both equations are equal but R.H.S is unequal so the system has no solution at all.

In short, Your Answer would be "No Solution"

Hope this helps!