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-4x - 5 + x = 6x - 7x - 14
-3x - 5 = -x - 14
-3x + x = -14 + 5
-2x = -9 /:(-2)
x = 4,5
spr.
(-4) * 4,5 - (5 - 4,5) = 6 * 4,5 - 7 * (4,5 + 2)
-18 - 0,5 = 27 - 7 * 6,5
-18,5 = 27 - 45,5
-18,5 = -18,5
L = P