Math 4th Grade
posted by marsha .
200 coins are sorted and kept 3 bags. The first bag has 20 more coins than the second bag. The second bag has twice as many coins as the third bag. How many coins are there in the third bag?

x = third bag
x + 2x + 2x + 20 = 200
5x = 200  20
x = 180/5
x = 36