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Пояснение: В данном уравнение нужно использовать перенос чисел через знак = Так же используем свойство, что при переносе через знак =, знаки чисел(букв) меняются на противоположные. То есть если число было положительным, то при переносе через знак = число станет отрицательным. Буквы в одну сторону, цифры в другу. Мы -4 переносим к 5 через знак =, -4 становиться положительным = 4, так и 4х мы переносим к иксам, следовательно 4х тоже меняет свой знак на противоположный = -4х Дальше просто вычисляем, и в конце получаем уравнения начальной школы. -3х=9 Мы 9 : (-3) = -3. Так как, при умножении или деление положительного числа на отрицательное, положительное приобретает знак минус.
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