Question

What is the solution of this linear system? x + 3y = -8,4x − 3y = 23

Answer 1

The answer is :  y= -11/3 , x=3

Answer 2

x=-8-3y and x=(23+3y)/4

Since the solution has y=y and x=x we can say:

-8-3y=(23+3y)/4

-32-12y=23+3y

-32-15y=23

-15y=55

y=-11/3, and since x=-8-3y, x=-8+11=3

so the solution is:

(3, -11/3)