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25x - 9 = 19 + 21x
...... x = .......
4x = 28 /:4
x = 7
25x-9=19+21x czyli to będzie:
4x=28 x=7
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25x - 9 = 19 + 21x
4x = 28 /:4
x = 7
25x-9=19+21x czyli to będzie:
4x=28 x=7