Betty had $40 in her pocket. she bought 12 identical bags of popcorn. betty was left with $10 after buying the popcorn. what was the price, in dollars, of each bag of popcorn?

Each bag of popcorn costs $2. 5 

You can solve it by creating an equation. This one can be: 

40 -12x = 10

Undo the operation. 

40 -12x = 10

-40 -12x = 10 -40

Eliminate the 40. This will live you with the following.

-12x = -30

Divide -12x by -12. Do the same with the -30

-12x = -30/ -12

This will give you the answer.

x = 2.5 

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)