Answer:
C
Step-by-step explanation:
the cat weighs 21 pounds.
the dog weighs 43 pounds
dog = 3x-20 = x + 22
cat = x
3x-20 = x+22
3x = x+42 (add 20 to both sides)
2x = 42 (subtract x from both sides)
x = 21
The answer is that s = 55/42.
Here's how to solve it
