No sane algebra teacher would assign an equation to solve containing a term
written as .  But many a student leaves off parentheses, whenever a
numerator or denominator contains more than one number or one letter. So they
probably typed 

 incorrectly as 2x+3/3, when it should have been typed as (2x+3)/3.

This problem either was intended to be:

 or possibly .  Most likely
the first one:



Multiply each term by the LCD of 15 to clear of fractions.





Distribute to remove the parentheses:



Collect like terms:



Add 9 to both sides:





Multiply (or divide) both sides by -1



Edwin