Substitution.
Here is an example.
Let x be equal to 3 and y equal to 3.

From this we can conclude that the values of both x and y are equal to three therefore x and y have the same value and are equal.

Here in your case we have:

Hope this helps.
r3t40
Yes it is a function Bc the x values don’t repeat
Answer:
Step-by-step explanation:
To find the answer convert the amount kilograms you have to grams
This is. Pemdas. P is puntion. M mutupaTy d division a. Aadd s subtraant
Number 9 is 36 because there are 18/40 who feel safe, so it multiplied would be 36. C