2A/3=8+4A

my problem is to figure out what A is alone but my answer doesnt match the book, i know its either A=12/5 or A=-2.4 but my answer doesnt come close.

first i tried it 2A/3=8+4A then take 4A from both sides to get -2A/3=8, times by 3 to get rid of it. -2A=24, then devide by -2, A= -12.