Question 483048
You could have 


10-5x2-3= 5 x -1 = -5


OR


10-5x2-3=10-10-3 = -3  (this is the correct answer since it follows the order of operations)


OR


10-5x2-3=10-5x(-1) = 10+5 = 15


OR



10-5x2-3=5x2-3=10-3=7



Assuming that order does not matter when it comes to performing the operations.