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x + 36 = 79

                   x = ........................

                               x =..........

spr. ............................

84 -  z = 31

                   z = ........................

                               z =..........

spr. ............................

58 – x  = 17

                   x = ........................

                               x =..........

spr. ............................

x -  36 = 54

                   x = ........................

                               x =..........

spr. ............................

16 +  a = 58

                   a = ........................

                               a =..........

spr. ............................

42 + x = 85

                   x = ........................

                               x =..........

spr. ............................

x - 23 = 22

                   x = ........................

                               x =..........

spr. ............................

b + 15 = 40

                   b = ........................

                               b =..........

spr. ...................

47 – x  = 13

                   x = ........................

                               x =..........

spr. ............................

x + 24  = 76

                   x = ........................

                               x =..........

spr. ............................