Ng Bi Qi's answer to Pravin Raj's Secondary 1 Maths Singapore question.

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Ng Bi Qi
Ng Bi Qi's answer
16 answers (Tutor Details)
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Hope this helps!
As for algebra, don't treat it as a new thing and be worried about it :)
Algebra is just numbers that are in forms of alphabets since the numbers are unknown. Hence always try to think of it as numbers/replace them as numbers to understand them better!
Don't worry, you will slowly get the hang of it!