-0.4x-0.4y=0

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Solution for -0.4x-0.4y=0 equation: 


Simplifying
-0.4x + -0.4y = 0

Solving
-0.4x + -0.4y = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '0.4y' to each side of the equation.
-0.4x + -0.4y + 0.4y = 0 + 0.4y

Combine like terms: -0.4y + 0.4y = 0.0
-0.4x + 0.0 = 0 + 0.4y
-0.4x = 0 + 0.4y
Remove the zero:
-0.4x = 0.4y

Divide each side by '-0.4'.
x = -1y

Simplifying
x = -1y

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