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

Mathematics

2 answers:

densk [106]3 years ago

7 0

$1.3(7+n)=91|:1.3\\7+n=70|-7\\
n=63$

dybincka [34]3 years ago

4 0

$130\%(7+n)=91 \\
1.3(7+n)=91 \\
7+n=\frac{91}{1.3} \\
7+n=70 \\
n=70-7 \\
n=63$

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