Chap 5: Algebra Worksheet 3 - Worked Solution to Q15 & Q16

Here's the worked solution for Q15 & Q16 (as promised)

For Q15, did you notice that

• the parts of the questions were systematically simplified before we put the 2 major parts together to solve? 
• when put together for the first time, brackets are used for each part? This will reduce the confusion, especially when we are to subtract one part from another.

For Q16, did you notice that

• before answering to the questions, we tried to sieve out as much information from the question as possible? These are needed to use to solve the parts.
• the information are clearly 'labelled'? e.g. "Elsie's age". This helps to reduce confusion subsequently.