y-(y+4)=4

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Solution for y-(y+4)=4 equation: 


Simplifying
y + -1(y + 4) = 4

Reorder the terms:
y + -1(4 + y) = 4
y + (4 * -1 + y * -1) = 4
y + (-4 + -1y) = 4

Reorder the terms:
-4 + y + -1y = 4

Combine like terms: y + -1y = 0
-4 + 0 = 4
-4 = 4

Solving
-4 = 4

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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