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21 + x = 40
x=


7 + x = 19
x=


29 + x = 61
x=


59 + x = 86
x=


68 + x = 96
x=


13 + x = 45
x=


70 + x = 88
x=


6 + x = 20
x=


2 + x = 3
x=


25 + x = 31
x=


11 - x = 7
x=


83 - x = 20
x=


38 - x = 33
x=


54 - x = 52
x=


89 - x = 88
x=


15 - x = 5
x=


51 - x = 17
x=


65 - x = 8
x=


81 - x = 41
x=


80 - x = 61
x=


x - 5 = 20
x=


x - 0 = 3
x=


x - 0 = 3
x=


x - 2 = 33
x=


x - 38 = 59
x=


x - 59 = 86
x=


x - 13 = 19
x=


x - 53 = 92
x=


x - 24 = 54
x=


x - 22 = 53
x=