main algebraic solution

Mathematics
Tutor: None Selected Time limit: 1 Day

May 26th, 2015

I know the answer is A but I cannot be able to work it out

May 26th, 2015

then don't answer the question at all

May 26th, 2015

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May 26th, 2015
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May 26th, 2015
Feb 27th, 2017
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