So. let's say the numbers are "a" and "b"
whatever they're, we know a + b = 56
let's say the larger one is "b", so 3 times the smaller is 3*a or 3a
now, 12 less than that, is 3a - 12
and the larger is that, so b = 3a - 12
so

solve for "a", to see what the smaller one is
what's b? well, b = 56 - a
Step-by-step explanation:

Answer:
4d (the variable is usually x, though).
Step-by-step explanation:
Because 4 x the amount of fish in each tank = total amount of fish
A and c are true ! I hope this helps
old weight - decrease = new weight
decrease = weight * percent
decrease = 72 * .125 = 9 lbs
old weight - decrease = new weight
72 - 9 = new weight
63 lbs
A healthy weight for the dog is 63 lbs