Answer :
Negatives cancel out positives so the +after the 4 changes to a minus and removes the - in the 3 so the equation changes to
-4 - 3 + 6 to make it easier, use the commutative property, 6 - 4 - 3 which equals -1
-4 - 3 + 6 to make it easier, use the commutative property, 6 - 4 - 3 which equals -1