Question 903658
one problem  at  a time  
limit 5 question per 24 hours
no duplicates or similar problems

(2/3)n-5=25+n/6
4/6*n-1/6n=30
3/6n=30
1/2n=30
n=60
check
2/3*60-5=25+60/6
40-5=25+10
35=35
ok