Question 7715
Let n be the unknown number, then:
 {{{n/3 = n/2 - 5}}} Multiply both sides by 3.

{{{n = 3n/2 - 15}}} Multiply both sides by 2.

{{{2n = 3n - 30}}} Add 30 to both sides.

{{{2n + 30 = 3n}}} Subtract 2n from both sides.

n = 30

Check:

{{{30/3 = 30/2 - 5}}}
{{{10 = 15 - 5}}}

{{{10 = 10}}}