Question

Which equation shows the substitution method being used to solve the system of linear equations? i was thinking B but don't know for sure

x + y = 6
x = y + 2

A.
x + (y + 2) = 6

B.
x + y = y + 2

C.
(y + 2) + y = 6

D.
x = (x – 6) + 2

Answer 1

`\left \{ {x+y=6} \atop {x=y+2}} \right. \ \ \ \ \ | substitute\ x=y+2\ into\ first\ equation\\\\ (y+2)+y=6\\\\ Solution\ is\ C.`