12 - 5(x+1) = 7 + 3x -2x
12 - 5x - 5 = 7 + x
-5х-х=7-12+5
-6х=0
х=0
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12 - 5(x+1) = 7 + 3x -2x
12 - 5x - 5 = 7 + x
-5х-х=7-12+5
-6х=0
х=0