Hui Ying's answer to Vani's Secondary 3 E Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Hui Ying
Hui Ying's answer
2 answers (A Helpful Person)
1st
I hope this helps! Remember to compare coefficients for these types of questions when u have to find unknowns.