Ответы на вопрос:
(2x-9)/6 - 2(5x+3)/15 = 1/2(2x-9)/6 - 2(5x+3)/15 - 1/2 = 0 [15(2x-9) - 6*2(5x+3) - 45]/90 = 0 [30x-135-60x-36-45]/90 = 0 -30x-216 = 0 30x+216 = 0 30x = -216 x = -7,2
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