Question

give medal! 1. Solve using linear combination.

y – x = –3
y + x = 3

(Points : 1)
(–3, 0)
(3, 0)
(0, 3)
(0, –3)

Answer 1

y-x=-3
y+x = 3 add them to eliminate the x
-----------------
2y = 0
y = 0

y-x=-3
y+x = 3 subtract them to eliminate y
-----------------------
-2x = -6
x = 3

so the coordinates would be (3, 0)