Yoshiko collected some bottle sto be recycled. Twelve were brown. There were 50 more clear bottles than brown ones. There were 30 fewer green than clear ones. How many bottles did yoshiko collect

So we know there are 12 brown ones

brown=12

50 more than 12 is the number of clear bottles so 50+12=62

brown=12

clear=62

30 numbers down from 62 is the number of green ones so 62-30=32

brown=12

clear=62

green=32

12+62+32=106

so Yoshiko collected 106 bottles