benlindquist
  • benlindquist
The solution of 12x - 7>6. need answer checked
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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tkhunny
  • tkhunny
Great. Show us how you obtained your answer.
benlindquist
  • benlindquist
12x - 7+7>6+7 12x>6+7 12x>13 x=1
benlindquist
  • benlindquist
5 people said that was how ya do it

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More answers

anonymous
  • anonymous
Well, we have : 12x - 7 > 6 the inequation is equivalent of the following : 12x - 7 + 7 > 6 + 7 12x > 13 (1/12) * 12x > 13/12 1*x > 13/12 finally : x > 13/12 therefore the set S of solutions is : S = ( 13/12 , +oo )
anonymous
  • anonymous
hope that helped
mathmale
  • mathmale
Ben, this is a good start, but a questionable finish. 12x - 7+7>6+7 You've added 7 to both sides. Great. 12x>6+7You've simplified. Fine. 12x>13 Also fine. x=1 What happened to the inequality symbol? And where did the 1 come from? Think about this and try again, please.
benlindquist
  • benlindquist
I'm getting different answers on multiple choices
anonymous
  • anonymous
Add 7 to both sides. 12x > 13 Divide with 12 x > 13/12
mathmale
  • mathmale
I'm sorry. But that's life. Keep trying. I've done my best to give you feedback on where the problem lies.
benlindquist
  • benlindquist
http://prntscr.com/9egjw5
tkhunny
  • tkhunny
Mathematics isn't normally done by crowd sourcing. It has to lead to a correct conclusion. It is not significant if 2,000,000 people do it in a way that leads to an incorrect result.
benlindquist
  • benlindquist
ill do the question over
mathmale
  • mathmale
No need to. Just go back to your 12x > 13 and decide what to do next.
benlindquist
  • benlindquist
ok
benlindquist
  • benlindquist
after the 12x>13 do u divide or what
benlindquist
  • benlindquist
nvm
mathmale
  • mathmale
You want to solve for x, so divide both sides by 12.
mathmale
  • mathmale
that operation will "isolate" x.
benlindquist
  • benlindquist
ali, said to add 7 to both
tkhunny
  • tkhunny
Don't use your calculator. It may be set to something that rounds to 1.
benlindquist
  • benlindquist
ok
benlindquist
  • benlindquist
2?
tkhunny
  • tkhunny
Why isn't it 13/12? Is there an instruction to pick the "nearest integer" or something like that?
mathmale
  • mathmale
Ben, sounds as tho' you have too many helpers, not all of whom are qualified to help you. It'd be so much better to develop confidence in your own work, which comes with practice.
benlindquist
  • benlindquist
ok
mathmale
  • mathmale
To review what you've done: 12x - 7+7>6+7 You've added 7 to both sides. Great. 12x>6+7You've simplified. Fine. 12x>13 Also fine. x=1 What happened to the inequality symbol? And where did the 1 come from? Think about this and try again, please. 12x>13 is fine. Now solve for x. What does that mean? Isolate x by itself on the left side. How do you get rid of the coefficient 12 on the left side? Divide both sides of the inequality by 12, then STOP. Try it, please.
benlindquist
  • benlindquist
got it
anonymous
  • anonymous
12x - 7 > 6 -> (12x - 7) + 7 > 6 + 7 -> 12x + (-7 + 7) > 6 + 7 -> 12x + 0 > 13 -> 12x > 13 -> x > 13/12
benlindquist
  • benlindquist
what is that
anonymous
  • anonymous
1 is not > 13/12, so you have to find another selection that is greater than 13/12.
anonymous
  • anonymous

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