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01-06-2016
Mathematics

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Solve mathematics problem in photo please! :) First.

Solve mathematics problem in photo please First class=

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01-06-2016

Hello,

Answer B

if 3k+3<0 ==>|3k+3|=-3k-3

==>-3k-3>12
==>-3k>15
==>k<-5

if 3k+3>0 then |3k+3|=3k+3
3k+3>12
==>3k>9
==>k>3

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