Question

РЕШИТЬ ДВОЙНОЕ НЕРАВЕНСТВО -12«2(x+3)«4

Answer 1

-12<=2(x+3)<=4

-12<=2x+6<=4

-18<=2x<=-2

-9<=x<=-1

хЄ[-9;-1]

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Answer 2

-12<= 2(x+3)<=4    /:2

-6 <= x+3 <=4        /-3

-9 <= x<=1

x принадлежит промежутку [-9;1]