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

x – y = 7
x = y + 3

A.
(y + 3) – y = 7

B.
x – (y + 3) = 7

C.
x – y = y + 3

D.
x = (7 – x) + 3

Question

Which equation shows the substitution method being used to solve the system of linear equations? 
 
x – y = 7 
x = y + 3
 
 A.
(y + 3) – y = 7
 
 B.
x – (y + 3) = 7
 
 C.
x – y = y + 3
 
 D.
x = (7 – x) + 3

pooja195 · Answer

ok well since X is already isolated you want to plug it in the equation

pooja195 · Answer

the top one

pooja195 · Answer

which one is it?

anonymous · Answer

The answer is A

pooja195 · Answer

@Iramos1998 please dont give direct answers

anonymous · Answer

You did... When you said "the top one"

pooja195 · Answer

i meant the top equation

anonymous · Answer

its a because it has to be (y+3)and then -y=7

anonymous · Answer

thanks dow

anonymous · Answer

Then you should be conscientious of how you word your replies.