Practice Problem #1

x - 11 = 41

Practice Problem #2

x - 17 = -35

Practice Problem #3

84 = 40 + x

Practice Problem #4

45 = -15 + x

Practice Problem #5

-21 = -52 + x

__Answers:__**Practice Problem #1**

x - 11 = 41

x - 11 + 11 = 41 + 11

x + 0 = 52

x = 52

__check__

52 - 11 = 41

41 = 41

**Practice Problem #2**

x - 17 = -35

x - 17 + 17 = -35 + 17

x + 0 = -18

x = -18

__check__

-18 - 17 = -35

-35 = -35

**Practice Problem #3**

84 = 40 + x

84 + ( - 40) = 40 + (-40) + x

44 = 0 + x

44 = x

__check__

84 = 40 + 44

84 = 84

**Practice Problem #4**

45 = -15 + x

45 + 15 = -15 + 15 + x

60 = 0 + x

60 = x

__check__

45 = -15 + 60

45 = 45

**Practice Problem #5**

-21 = -52 + x

-21 + 52 = -52 + 52 + x

31 = 0 + x

31 = x

__check__

-21 = -52 + 31

-21 = -21

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