Section: Math

39) If 2x+2y=0, which of the following must be equivalent to 2x-2y?

-4y
^2x/_2y
y
y²

Explanation

STEP ONE. Separate the two variables and get rid of the 0 (2x=-2y).
STEP TWO. Divide by 2 (x=-y).
STEP THREE. Plug in -y for x and solve. This leaves Answer 1.