IGCSE inequality question Watch

qatarownz
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#1
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6(2-3x) - 4(1-2x) <= 0

i got it wrong
just show me the working out, ill compare to mine, cuz every time i post my own working out here, everything mixs up
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Notnek
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(Original post by qatarownz)
6(2-3x) - 4(1-2x) <= 0

i got it wrong
just show me the working out, ill compare to mine, cuz every time i post my own working out here, everything mixs up
Full solutions are not allowed in this forum.

Please post any working you have done and I'll make sure that nothing mixes up
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qatarownz
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#3
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(Original post by notnek)
Full solutions are not allowed in this forum.Please post any working you have done and I'll make sure that nothing mixes up
12-18x-4-8x<=016-26x<=0
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Zacken
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(Original post by qatarownz)
12-18x-4-8x<=016-26x<=0
It should be

12 - 18x - 4 + 8x <= 0

We can simplify that down to:

(12-4) + (-18x + 8x) <= 0

(12-4) - 10x <= 0

What is 12-4?
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qatarownz
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(Original post by Zacken)
I agree with 12 - 18x - 4 - 8x <= 0We can simplify that down to: (12-4) + (-18x - 8x) <= 0(12-4) - 26x <= 0What is 12-4?
  • 12-4= 8?
  • so 8-26x<=0
  • 8-26x<=-8
  • /26x
  • x>=13/4
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TimGB
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(Original post by Zacken)
I agree with

12 - 18x - 4 - 8x <= 0
I don't. It should be 12 - 18x - 4 + 8x ≤ 0
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Zacken
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(Original post by qatarownz)
  • 12-4= 8?
  • so 8-26x<=0
  • 8-26x<=-8
  • /26x
  • x>=13/4
Urgh, sorry - I made a mistake, see above.
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Zacken
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(Original post by TimGB)
I don't. It should be 12 - 18x - 4 + 8x ≤ 0
Yep, sorry. Thanks for pointing it out.
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