Respuesta :
					                   First you want to collect the like terms, 2a=45 , then divide both sides of the equation by 2 which is a=2/5 , or a=0.4
					                
					                
					             
					                   I can help clarify Anna's answer. 0.4, which for some reason you did not know, is equal to 2/5, or answer choice (A).
					                
					                
					              
			                   
					                  