Ответы на вопрос:
5x - x + 5(x-5) = -x)-4 -5x - x + 5x - 25 = 5x + x - 4 -7x = -4 + 25 -7x = 21 x = -3
Y/6 = 3 => y = 6*3 => y=18 6/y = 3 => y = 6/3 => y=2 3y = 6 => y = 6/3 => y=2 6y = 3 => y = 3/6 => y=1/2 => y=0,5
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