Пошаговое объяснение:
4х + 15х = 3х + 12х
19х = 15х
19х - 15х = 0
4х = 0
х = 0 : 4
х = 0
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Пошаговое объяснение:
4х + 15х = 3х + 12х
19х = 15х
19х - 15х = 0
4х = 0
х = 0 : 4
х = 0