December 2018 2 20 Report
Proszę o obliczenie x z wytłumaczeniem.
1. 3x - 7 = -2x + 8
x =
2. 7x + 5 = 5x +9
x=
3. -4x - 15 = -2x +7
x=
4. 9x + 5 = 6x + 6

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