Coordinated Triangle
Geometry
Level
pending
Let \(A, B\) and \(C\) be the intersection points between line \( r:\quad x+y-2=0 \), line \( s:\quad x-7y+2=0 \) and the \(x\)-axis. The sum of the coordinates of the gravity center of the \(ABC \) triangle is \(\text{__________} \).
by
Vitor Santos