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IGCSE inequality question

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
(edited 7 years ago)
Reply 1
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 :smile:
Reply 2
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 :smile:
12-18x-4-8x<=016-26x<=0
Reply 3
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?
(edited 7 years ago)
Reply 4
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

(edited 7 years ago)
Original post by Zacken
I agree with

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



I don't. It should be 12 - 18x - 4 + 8x 0
(edited 7 years ago)
Reply 6
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.
Reply 7
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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