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PostPosted: Sat Jun 30, 2018 11:39 am 
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Joined: Thu Mar 06, 2014 1:50 pm
Posts: 148
Can anyone help in explaining the following please?
y is 1/2 of x

Which of the following is incorrect?
x = 2y
y = 2x Answer ( Dd thought this was correct)
y = x/2
x/y = 2
y/x = 1/2


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PostPosted: Sat Jun 30, 2018 11:54 am 
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Joined: Mon Oct 21, 2013 7:59 pm
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If y is half of x, x is obviously bigger than y.

Therefore y= 2x cannot be right as 2x effectively means 2 times x.

If x is bigger than y already, multiplying it by 2 is going to make it even bigger, therefore y cannot possibly = 2x!!!


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PostPosted: Sat Jun 30, 2018 12:15 pm 
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Joined: Thu Mar 06, 2014 1:50 pm
Posts: 148
Thank you! Will show to Dd now :)


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PostPosted: Sat Jun 30, 2018 12:44 pm 
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Joined: Mon Feb 12, 2007 1:21 pm
Posts: 16026
Try thinking in numbers as well. y is 1/2 of x is the same as 5 is half of 10 ...

y .... x
5 .....10

so then test out.


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PostPosted: Sat Jun 30, 2018 3:51 pm 
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Joined: Thu Mar 06, 2014 1:50 pm
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Thank you Guest55 - makes it easier to understand like that!


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