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

User RenatoSz
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1.3(7+n)=91|:1.3\\7+n=70|-7\\ n=63
User John Linhart
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130\%(7+n)=91 \\ 1.3(7+n)=91 \\ 7+n=(91)/(1.3) \\ 7+n=70 \\ n=70-7 \\ n=63
User Benito Bertoli
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