SOLUTION: 12<1-x=<15
i come up with an answer of -11 and -14 however my book says this is wrong, only the negative -14 is correct
Algebra ->
Inequalities
-> SOLUTION: 12<1-x=<15
i come up with an answer of -11 and -14 however my book says this is wrong, only the negative -14 is correct
Log On
Question 316677: 12<1-x=<15
i come up with an answer of -11 and -14 however my book says this is wrong, only the negative -14 is correct Found 3 solutions by stanbon, solver91311, nyc_function:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! 12<1-x=<15
---
Subtract 1 along the line to get:
11 < -x <= 14
---
Multiply thru by -1.
Note: When you multiply by a negative the
order of the inequalities change.
----
-14 <= x < -11
=========================
Cheers,
Stan H.
Then you are right and the book is wrong, UNLESS there is more to the problem than you have shared with us. Like perhaps it says "What is the lower limit of the interval containing " or some such language.
You can put this solution on YOUR website! Do you mean 12 ≤ 1 - x ≤ 15?
Or do you mean 12 < 1 - x ≤ 15?
In either case, plug both answers into the original inequality.
If you get a true statement, then you will know which answer is correct.
Understand?
(