How do u write y=-2x in standard form

Standard form is Ax+By = C. We need to get the x and y terms on the same side. To do this, we add 2x to both sides

y = - 2x

y+2x = - 2x+2x

y+2x = 0

2x+y = 0

So the answer is 2x+y = 0

This is in the form Ax+By = C where

A = 2

B = 1

C = 0