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19-11-2020
Mathematics

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given that 4 x - 5 y = 21 find x when y = - 4 give your answer as a fraction in its simplest form

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arosas1570 arosas1570

19-11-2020

Answer:

x=-1/4

4x-5(-4)=21

4x+20=21

4x=1

x=1/4

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