33 - 7 = x - 26, 18 - x = 5 - 13, 3 ⋅ x = 36 - 12, x - 9 = 13 - 22, x : 4 = 15 - 60, 31⋅ 7 = x - 217,

Kopfrechnen Terme/Gleichungen 1 (9b)

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