Answer:
la solución es -4/15
Step-by-step explanation:
2/5-1/6+3/10-4/5
((2*6)-(5*1))/((5*6))+((3*5)-(10*4))/((10*5))=(12-5)/30+(15-40)/50=7/30+(-25)/50=7/30-1/2=((7*2)-(30*1))/((30*2) )=(14-30)/60=(-16)/60=-4/15
