Question

Which pairs of expressions are equivalent?
А. 14 - 9 and 14 + (-9)
B. 18 - 6 and -18 + 6
С. -7 - 22 and 22 - (-7)
D. 3 - 30 and 3 + (-30)
E. 10 - 5 and -5 - 10
F. -23 - 4 and -23 + (-4)