Answer:

Step-by-step explanation:
Let the number be x.
Translating the word problem into an algebraic equation, we have;
Opening the bracket, we have;

Collecting like terms, we have;

Answer:
try A
Step-by-step explanation:
The correct answer ic C)12
For every 3 dogs, there are 4 cats.
There are 4 cats and 3 dogs, so that means for every 3 dogs, there will be 4 cats.
There are 120 possibilities with 5 letters.