1) 2(х-15) a) 2х-15 b) 2х+30 c) 2х-30 2) -(4a-5b-2) a) 4a-5b-2 b) -4a+5b+2 c) -4a-5b-2 3) 0.9-(m-n) a) 0.9m-n b) 0.9-m-n c) 0.9-m+n 4) -3(a-2) a) -3a-6 b) -3a+6 c) -3a-2 5) -(-c-5-y) a) -c-5-y b) c-5-y c) c+5+y 6) (2x-y)·5 a) 2x-5y b) 10x-5y c) 10x-y

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