Help. ​

[ x + 3 ] / 3  = [ y + 2 ] / 2

(x / 3) + 3 / 3   = (y / 2) +  2 / 2     

(x / 3) + 1  =  (y / 2) + 1     subtract 1 from both sides

(x / 3)   =  ( y / 2)