April 2019 0 5 Report
Proszę o rozwiązanie! ;) (chodzi o to ile wynosi x)

5 - x = 7 x =
x - 7 = - 2 x =
x - 7 = - 10 x =
x - 9 = - 19 x =
20 - x = 29 x =
- 9 - x = 10 x =
x - ( - 7 ) = - 2 x =

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