shohm wrote:
Wondering why statement 2 is not sufficient :
(1) Original condition : 11m + 7b <= 15
(2) Statement 2: 10m + 8b <= 15
(1) + (2) gives 21m + 15 b <=30 OR 7m +5b <=10
Now,(2) - [(1) + (2)] gives 3m + 3b <=5 OR 27m + 27b <=45. Sufficient !
You cannot subtract inequalities that way.
ADDING/SUBTRACTING INEQUALITIES
1.You can only add inequalities when their signs are in the same direction:
If\(a>b\) and\(c>d\) (signs in same direction:\(>\) and\(>\) ) -->\( a+c>b+d\)
...
![FLO – Therapy at the Club – Pre-Single [iTunes Plus M4A]](http://is1-ssl.mzstatic.com/image/thumb/Music221/v4/a4/11/88/a41188ed-0f2e-e8d5-1163-d59e373cc58c/26UMGIM30046.rgb.jpg/208x208bb.webp)
.jpg)
