Which equation shows the substitution method being used to solve the system of linear equations?

x + y = 6
x = y + 5

A.
x + (y + 5) = 6

B.
(y + 5) + y = 6

C.
x = (x – 6) + 5

D.
x + y = y + 5

Question

Which equation shows the substitution method being used to solve the system of linear equations?
 
x + y = 6
x = y + 5
 
 
 A.
x + (y + 5) = 6
 
 B.
(y + 5) + y = 6
 
 C.
x = (x – 6) + 5
 
 D.
x + y = y + 5

alones · Answer

x + y = 6
x = y + 5
let's lok at the first one x+y=6
Step 1: Add -y to both sides.
x+y+−y=6+−y
x=−y+6 turns in to  x + y = 6
also substitute this one x = y + 5 and you will get (y + 5) + y =6                                   
  Put them together so it would look like this  (y + 5) + y =6