(y-5)-(y+7)=4

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Solution for (y-5)-(y+7)=4 equation:


Simplifying
(y + -5) + -1(y + 7) = 4

Reorder the terms:
(-5 + y) + -1(y + 7) = 4

Remove parenthesis around (-5 + y)
-5 + y + -1(y + 7) = 4

Reorder the terms:
-5 + y + -1(7 + y) = 4
-5 + y + (7 * -1 + y * -1) = 4
-5 + y + (-7 + -1y) = 4

Reorder the terms:
-5 + -7 + y + -1y = 4

Combine like terms: -5 + -7 = -12
-12 + y + -1y = 4

Combine like terms: y + -1y = 0
-12 + 0 = 4
-12 = 4

Solving
-12 = 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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