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

Question

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

Answer 1

-12<=2(x+3)<=4</p>

-12<=2x+6<=4</p>

-18<=2x<=-2</p>

-9<=x<=-1</p>

хЄ[-9;-1]

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Answer 2

-12<= 2(x+3)<=4    /:2</p>

-6 <= x+3 <=4        /-3</p>

-9 <= x<=1</p>

x принадлежит промежутку [-9;1]