2(500-у/3)=820

Question

2(500-у/3)=820

Answer 1

1000-2y/3=820

-2y/3=-180

y=270

Answer 2

2(500-у/3)=820

500-у/3=820:2

500-у/3=410

у/3=500-410

у/3=90

у=90*3

у=270