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

x – y = 7

x = y + 3

A.

x – y = y + 3

B.

x = (7 – x) + 3

C.

(y + 3) – y = 7

D.

x – (y + 3) = 7

Question

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

anonymous · Answer

Substitution method is substituting the value of x in the y or vice versa 
So which equation will satisfy  that fact?

anonymous · Answer

@abdullah1995 @amistre64

abdullah1995 · Answer

in the substitution method you solve for one variable from any equation you choose and then repace it in the second equation.

abdullah1995 · Answer

and so when solving you will only have 1 unknown either x or y. so from the options above you can clearaly cross out A and D because they have x and y both in them

anonymous · Answer

yes i think its b but thats the two i am stuck on b and c

abdullah1995 · Answer

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