Answer:
one solution (6, 2 )
Explanation:
x - y = 4 → (1)
x + y = 8 → (2)
add the 2 equations term by term to eliminate y
(x + x) + (y - y) = 8 + 4
2x + 0 = 12
2x = 12 ( divide both sides by 2 )
x = 6
substitute x = 6 into (2) and solve for y
6 + y = 8 ( subtract 6 from both sides )
y = 2
the system has one solution , that is (6, 2 )