Question

PLEASE SHOW WORK
Solve using substitution
y=x+4
x-y=-4

Answer 1

y = x + 4     (*)

x - y = -4    (**)

Substitute (*) to (**):

x - (x + 4) = - 4

x - x - 4 = - 4

- 4 = - 4     TRUE

Answer: Infinitely many solutions.

x ∈ R

y = x + 4

Answer 2

Answer:

x= -8      y= -4

Step-by-step explanation:

SOLVING FOR X

y=x+4

x-y=-4

----------------------

x-x+4= -4

   -4     -4

---------------------

x-x= -8

x= -8

SOLVING FOR Y

plug in the x in any equation

y=(-8)+4

y= -8+4

y= -4