Question

[nguyen longan]

(19+n)/(5+n)=7/6.

Answer 1

[ĐặngTuấnAnh]

Ta có: (19+n)/(5+n)=7/6

<=>(19+n).6=(5+n).7

<=> 114+6n=35+7n

<=>6n-7n=35-114

<=>-n=-79

=>n=79

 vậy n=79