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If b/a=2/5, what is the value of 2 (a/b)

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(b)/(a)=(2)/(5)\to(a)/(b)=(5)/(2)\ \ \ |\cdot2\\\\2\left((a)/(b)\right)=2\cdot(5)/(2)\\\\2\left((a)/(b)\right)=5

Answer: 2(a/b) = 5

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