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30 + x = 31
x=


1 + x = 1
x=


8 + x = 15
x=


19 + x = 24
x=


5 + x = 21
x=


9 + x = 37
x=


2 + x = 34
x=


25 + x = 28
x=


10 + x = 19
x=


34 + x = 35
x=


18 - x = 14
x=


34 - x = 18
x=


25 - x = 8
x=


24 - x = 10
x=


4 - x = 3
x=


33 - x = 23
x=


30 - x = 20
x=


31 - x = 28
x=


7 - x = 1
x=


33 - x = 19
x=


x - 5 = 15
x=


x - 40 = 40
x=


x - 7 = 20
x=


x - 34 = 44
x=


x - 24 = 43
x=


x - 7 = 36
x=


x - 5 = 14
x=


x - 29 = 37
x=


x - 7 = 34
x=


x - 6 = 8
x=