а) а×(-0, 55b)×(-0, 6c) = --0, 55ab×(-0, 6c)= 0,33abc
б) (4a-6)-(-11-5a)= 4a-6+11+5a=9a+5
в) -2(0,5х–1,4y)+2x+3,2y= -x+2,8y+2x+3,2y = x + 6y
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Answers & Comments
а) а×(-0, 55b)×(-0, 6c) = --0, 55ab×(-0, 6c)= 0,33abc
б) (4a-6)-(-11-5a)= 4a-6+11+5a=9a+5
в) -2(0,5х–1,4y)+2x+3,2y= -x+2,8y+2x+3,2y = x + 6y