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Secondary 1 | Maths
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rick
Rick

Secondary 1 chevron_right Maths chevron_right Singapore

can someone pls help n explaim how to do this

Date Posted: 1 month ago
Views: 39

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AC Lim
Ac Lim's answer
12425 answers (A Helpful Person)
1st
Hope this helps
rick
Rick
1 month ago
why did u times 2 n why did the 1/2 disappear ?
AC Lim
AC Lim
1 month ago
Left hand side x 2, right hand side must also x 2,
When right hand side x2, it cancel with ½.
i.e ½ × 2= 1
done {{ upvoteCount }} Upvotes
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AC Lim
Ac Lim's answer
12425 answers (A Helpful Person)
Hope this helps
AC Lim
AC Lim
1 month ago
In equation, what you do at left hand side, you must do the same to right hand side. So it is equal.
rick
Rick
1 month ago
why do u divide by 9
AC Lim
AC Lim
1 month ago
To get rid of 9 on right hand side.

In equation, if you want to find a unknown, for this question, a. So we leave "a" at one side, all other parameters move to another side or left hand side.

So we move 9, ½ and 13 to left hand side.
AC Lim
AC Lim
1 month ago
You can watch this explanation here...
https://youtu.be/Z-ZkmpQBIFo?feature=shared

Or YouTube, search "solve equation."
rick
Rick
1 month ago
ohh ok thxs