AC Lim's answer to rick's Secondary 1 Maths Singapore question.

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AC Lim
Ac Lim's answer
12513 answers (A Helpful Person)
Hope this helps
AC Lim
AC Lim
2 months 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
2 months ago
why do u divide by 9
AC Lim
AC Lim
2 months 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
2 months ago
You can watch this explanation here...
https://youtu.be/Z-ZkmpQBIFo?feature=shared

Or YouTube, search "solve equation."
rick
Rick
2 months ago
ohh ok thxs