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Matematyka z plusem liczby i wyrażenia algebraiczne cz II.
strona 59 zad 10,12
10. x - 3 = 0
x - 7 = -4
x + 3 = 6
2x = 6
x/3 = 1
-3x = -9
x - 5 = -2
x/6 = 1/2
12. g
2x + 9 = 17
- 9 - 9
2x = 8
:2 :2
x =
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