Question 216540
{{{15-a/3=-9}}}


Step 1.  Multiply three to both sides of the equation


{{{3*15-3*a/3=-9*3}}}


{{{45-a=-27}}}


Step 2.  Add a+27 to both sides


{{{45-a+a+27=-27+a+27}}}


{{{a=72}}}


Check...{{{15-72/3=-9}}}...which is a true statement.


Step 3. ANSWER is {{{a=72}}}


I hope the above steps were helpful.


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Good luck in your studies!


Respectfully,
Dr J