From Angie Herbert: My daughter is having problems with her algebra homework. She is a year 7 pupil at high school in the UK. She has been given homework on simplifying formulae and she doesn't understand how to do them. Here is an example of one of the questions : 9s+7t+5c+5s-3t
can you help her to understand how to do these and perhaps me too.
Answered by Penny Nom and Claude Tardif.
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