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# A-level maths induction task questions

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1. Hi, so in preparation for mobbing up to sixth form I've been given an induction task for maths that works on some of the stuff we might have forgotten, and to put it simply, i've forgotten a lot. One of the topics we were given was substitution and whilst I know a lot of it, there are quite a few questions I can't get, an example being 1/y = 2/3 - 1/x, which apparently gives the answer of x=3y/2y-3 and I can't seem to get it. If anyone has an easy way to work equations like this out, please can I have your help thanks
2. (Original post by Beth Mitchell)
Hi, so in preparation for mobbing up to sixth form I've been given an induction task for maths that works on some of the stuff we might have forgotten, and to put it simply, i've forgotten a lot. One of the topics we were given was substitution and whilst I know a lot of it, there are quite a few questions I can't get, an example being 1/y = 2/3 - 1/x, which apparently gives the answer of x=3y/2y-3 and I can't seem to get it. If anyone has an easy way to work equations like this out, please can I have your help thanks
cross multiplication my friend

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