х - 15 = 15 - 30, (х+49) - 78 = 83 - 112, х + 22 = 90 - 68, 8х-4х + 5 = 25 - 5, (26+х) * 12 = 360 - 4, 7х - 3х = 752 - 188, 72 : х = 4 - 18,

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