alindoriaralexij alindoriaralexij

31-05-2016
Mathematics

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123b is 0.4 of what number

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apologiabiology apologiabiology

31-05-2016

'of' means multiply
what number=x
123b is 0.4 of what
123b=0.4 times x
divide both sides by 0.4
307.5b=x

the number is 307.5n

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