A bag of marbles had 20 red marbles and the rest were black. For a game, 4/5 of the 20 red marbles were chosen, and 24 of the black marbles were also chosen. How many black marbles were in the bag before the game?

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24

step-by-step explanation:

in mathematics, a constraint is a condition of an optimization problem that the solution must satisfy. there are several types of constraints—primarily equality constraints, inequality constraints, and integer constraints. the set of candidate solutions that satisfy all constraints is called the feasible set.

hoped i'm right lol