math
posted by mike .
The two longest rivers in the world are the Nile and the Amazon. Together, they are 8145 miles, with the Amazon being 145 miles shorter than the Nile. Find the length of each river.

Let x = the Amazon
x + x + 145 = 8145
2x = 8,000
x = 4,000 
la=ln145
la+ln=8145
ln145+ln=8145
2*ln=8290
ln=...