I know this is simple arithmetic but i just cant seem to figure out the proccess in how to figure it out.

X = 0.11X + 3.366

i know that X = 3.8 but i don't now how to get it

X = 0.11X + 3.366

x - 0.11x = 3.366

0.89x = 3.366

x = 3.366/0.89

x = 3.78 = 3.8