ladydahvie1998 ladydahvie1998
  • 22-12-2014
  • Mathematics
Answered

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



Answer :

naǫ
naǫ naǫ
  • 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 konrad509
  • 22-12-2014
[tex]1.3(7+n)=91|:1.3\\7+n=70|-7\\ n=63[/tex]
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