16-10-2014
Mathematics

Answered

-2a - 9 equals 6a plus 15 please answer as fast as you can

Answer :

16-10-2014

Ok ready here we go -2a-9=6a+15 +2a. +2a -9=8a+15 -15. -15 -24=8a -24/8=a Good luck

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Аноним Аноним

16-10-2014

[tex]-2a-9=6a+15\ \ \ \ \ |add\ 9\ to\ both\ sides\\\\-2a=6a+24\ \ \ \ \ \ |subtract\ 6a\ from\ both\ sides\\\\-8a=24\ \ \ \ \ \ |divide\ both\ sides\ by\ (-8)\\\\\boxed{a=-3}[/tex]

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