what is the equation? how many coins in each pouch?

Answer: 2 bags "aka 2X" + 10 coins = 9 coins + 3 bags "aka 3x"
So...., 2x+10 = 9 + 3x
2x+10 - 3x = 9+ 3x - 3x ( subtract 3x from both sides )
-x + 10 = 9
-x + 10 - 10 = 9 - 10 ( subtract 10 from both sides )
-x = -1
-x/-1 = -1/-1 ( divide both sides by -1 )
Answer: x = 1 ( there's 1 coin in each bag or pouch )