Nasir and Seif began with an equal number of Skittles. Nasir ate 10 Skittles, and Seif ate 6. Now the ratio of Nasir's Skittles to Seif's Skittles is 2:3. How many Skittles did they each start with?

X=Amount of skittles at the start.

Nasir ate 10 skittles and Seif ate 6 skittles so the number of skittles they had (x) - how many they both ate equals : 2/3;

(x-10) / (x-6) = 2/3

3 (x-10) = 2 (x-6)

3x-30=2x-12

x-30=-12

x=18

They each started with 18 skilttles.