Which of the following would not be the result of a substitution in the following system?

2x + y = 7
y - x = 1

7 - 2x - x = 1
2x + x + 1 = 7
2(y + 1) + y = 7

Question

Which of the following would not be the result of a substitution in the following system?

2x + y = 7
y - x = 1

7 - 2x - x = 1
2x + x + 1 = 7
2(y + 1) + y = 7

masterized · Answer

The answer is B) 2x + x + 1 = 7 
Im not 100% sure but I would chose that answer if I was you :) Hope I helped x

saksh1998 · Answer

well all of them can be achieved by substituting x or y in one of the equations except for c so the answer is c
A) substitute y=x+1
B) substitute y=x+1
C) substitute x=y-1 but you don't get the required equation

fan and medal

jhonyy9 · Answer

<< fan and medal >> how is this please - ? you wan saying what you wan getting for your help ? but this is opposite to OS rules @mathmale your opinion please about this ? ty.