[Class work] Manipulation of Equation with 2 variables

A follow-up of last lesson's class discussion on the following, which most of you had clarified when you meet classmates doing the same question. We also went through the questions briefly at the end of the lesson.

The clip shows how the EXAMPLE is solved: 


Below are the links to questions assigned. 
Watch the clips to check your answers; do jot down any notes that you are still not clear. You may post it under the Youtube comment.









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