.4y=.4y-1

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Solution for .4y=.4y-1 equation: 


Simplifying
0.4y = 0.4y + -1

Reorder the terms:
0.4y = -1 + 0.4y

Add '-0.4y' to each side of the equation.
0.4y + -0.4y = -1 + 0.4y + -0.4y

Combine like terms: 0.4y + -0.4y = 0.0
0.0 = -1 + 0.4y + -0.4y

Combine like terms: 0.4y + -0.4y = 0.0
0.0 = -1 + 0.0
0.0 = -1

Solving
0.0 = -1

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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