Answer:
B
Explanation:
let the 2 numbers be x and y ( with x > y )
Form 2 simultaneous equations to solve for x and y , that is
x + y = 85 → (1)
x - y = 15 → (2)
adding (1) and (2) term by term will eliminate y
(x + x) + (y - y) = 85 + 15
2x + 0 = 100
2x = 100 ( divide both sides by 2 )
x = 50
substitute x = 50 into (1) and solve for y
50 + y = 85 ( subtract 50 from both sides )
y = 35
the two numbers are 50 and 35