There are many ways you can start off by solving an equation. In this case, the first operation used in solving this equation would be subtraction. You would have to subtract 5 from each side.
Answer:

Step-by-step explanation:

The puppy weighs 15.4 pounds, 40% of 11 is 4.4 so add that to the wight and its 15.4
Answer: That is a function!
Step-by-step explanation: