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WebGraphing.com Forum » List all forums » Forum: Algebra, Pre-Algebra, and Basic Math Homework Help » Thread: Trying to solve inequality... |
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a068247
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6x+2(x-10)>8x-7... I tried using the Inequality solver/graph, but no results..can some assist me please? |
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pskinner
Joined: Apr 2, 2005 Posts: 797 Status: Offline |
I tried your inequality using the 1D inequality solver/grapher, 6x+2(x-10)>8x-7, and got an answer! Perhaps you did not understand the answer, which says that there are no solutions. It also indicated that when each side is rewritten and simplified, you can get -13>0, which is impossible and that is the reason why there are no solutions. Let's take another look: The left hand side reduces to: 6x+2x-20=8x-20. So, you have: 8x-20>8x-7. Subtracting 8x from both sides you get: -20>-7, which is impossible. This was rewritten by adding 7 to both sides and getting the equally impossible result: -13>0. Of course, doing things by hand, you don't really need that last step to see the answer. Hope this explains what happened. ---------------------------------------- Principal Skinner |
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Re: Trying to solve inequality...