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19x = 57 / :19
x = 3
-8 + 1,6x + 1,2x - 24 + 0,2x = -58
3x = -26 / : 3
x = - 26/3 = - 8 2/3
x^2 - 5x - x^2 - 4x = -63
-9x = -63 / : (-9)
x = 7
Liczę na NAJ.