4,2x - (3,4x + 4) = 7 - (8 - 1,2x)
4,2x - 3,4x - 4 = 7 - 8 + 1,2x
-0,4х = 5 | :(-0,4)
х = -12,5
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4,2x - (3,4x + 4) = 7 - (8 - 1,2x)
4,2x - 3,4x - 4 = 7 - 8 + 1,2x
-0,4х = 5 | :(-0,4)
х = -12,5