need to know what is left in the bag after some poured into canister which gives the canister 2 times the mass over the bag
In order to answer this question we need to rewrite the word problem as a formula.
Start with the values they give you, 5026 and 4125. This is the total amount of flour. The flour will then be split so that 2 times as much is in the canister than in the bag, 2x and x.
From this you can set up a formula that sets the total amount of flour equal to the final amounts in the canister and bag:
5026 + 4125 = 2x + x
9151 = 3x
9151/3 = 3x/3
3050.33 = x
Since x was the amount left in the bag the answer will be 3050 and 1/3 (3050.33)