Question

[6.02] For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation?

2x + y = 9
−x − y = −8

−8 + y

−8 − y

8 + y

8 − y

Answer 1

To isolate the x in first equation, add 2y to both sides of the equal sign of the first equation
x - 2y = 6
x - 2y + 2y = 6 + 2y
x = 6 + 2y

Answer 2

i dont see that in the choses the four choses are posted hun