Ответ:
-2х+20х-20+2=-18х-18= -18(х+1)
-2x+4(5x-5)+2= -2x+20x-20+2 = 18x-18
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Ответ:
-2х+20х-20+2=-18х-18= -18(х+1)
-2x+4(5x-5)+2= -2x+20x-20+2 = 18x-18