ladydahvie1998 ladydahvie1998

22-12-2014
Mathematics

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130% of the sum of 7 and a number n is equal to 91.

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22-12-2014

[tex]130\%(7+n)=91 \\ 1.3(7+n)=91 \\ 7+n=\frac{91}{1.3} \\ 7+n=70 \\ n=70-7 \\ n=63[/tex]

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konrad509 konrad509

22-12-2014

[tex]1.3(7+n)=91|:1.3\\7+n=70|-7\\ n=63[/tex]

Answer Link

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