10 + 1/3x= 13
1/3x=3
divide 1/3 on each side to cancel it out
3/ 1/3= 3 times 3 which equals= 9
the number is 9
Answer:
The answer already exists in your question...
That is correct expansion

Home Water Works says that in most homes, showers are the third-largest user of water after toilets and clothes washers. The average American shower water usage is 17.2 gallons with the average shower length being 8.2 minutes. The average flow rate is 2.1 gallons per minute.

No, because a scalene triangle has to have all sides that are different lengths. 2 sides being 13 inches would mean that the triangle has 2 sides that are equal, making it an isosceles triangle.