Respuesta :
					                   x+21=59
x=59-21
x=38
when you transfer number to other side of the equation it's sign becomes opposite like in this instance +21 became -21 on the other side
					                
					             x=59-21
x=38
when you transfer number to other side of the equation it's sign becomes opposite like in this instance +21 became -21 on the other side
 
					                  