Standard form : Ax + By = C
y = 4/5x - 2....subtract 4/5 from both sides
-4/5x + y = -2 ....multiply both sides by -5
4x - 5y = 10 <== standard form
0.074n = 74
multiply both sides by 1000 to make the process simpler
74n = 74000
divide both sides by 74
n = 1000
Here is a video to help you with your question:
https://youtu.be/WaeD3qKc7Jc