# If you Add 2 to four times the length of the Amazon river, the result is 25,750. How do you find the length of the river?

Jan 31, 2016

6437

#### Explanation:

let the length of the river be l

so four times the length = 4l and add 2 to this = 4l + 2

Now this result is equal to 25 750

hence 4l + 2 = 25 750

subtract 2 from both sides : 4l + 2 - 2 = 25 750 - 2

and 4l = 25 748

divide both sides by 4 : $\cancel{4} \frac{l}{\cancel{4}} = \frac{25 748}{4}$

gives l = 6437