Question

(4,9-x):1,2=3 срочноооо

Answer 1

49/10*10/12-x*10/12=3
490/120-10x/12=3
490-100x=360
100x=130
x=1.3

Answer 2

I'm sorry, but I'm not sure what you're asking. "(4,9-x):1,2=3" is not a clear or complete question or statement. Can you please provide more context or clarify what you are asking?