Answer:
4x3 12 12 3/5 0,5 12,32,98/37
This is because Nate is isolating the variable. For example, in the equation 10x=40, you would divide both sides by 10 in order to get the variable by itself, just as Nate did. Nate is also performing the inverse operation, which allows for one to undo/unravel the question to find the answer.
28/7=4. As a result, the constant of proportionality is 4. Hope it help!
U need the law of cosines and heron's formula