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17-03-2014
Mathematics

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a) solve 4(y-7) = 13

b) make t the subject of the formula P =4t - 3

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Аноним Аноним

17-03-2014

[tex]a)\\ \\4(y-7) = 13\\ \\4y-28=13\\ \\4y=13+28\\ \\4y=41/:4\\ \\y=\frac{41}{4}=10\frac{1}{4}[/tex]

[tex]b)\\\\P =4t - 3\\ \\4t=P+3/:4\\ \\t=\frac{P+3}{4}[/tex]

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