(y-7)-(y+7)=9

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Solution for (y-7)-(y+7)=9 equation:


Simplifying
(y + -7) + -1(y + 7) = 9

Reorder the terms:
(-7 + y) + -1(y + 7) = 9

Remove parenthesis around (-7 + y)
-7 + y + -1(y + 7) = 9

Reorder the terms:
-7 + y + -1(7 + y) = 9
-7 + y + (7 * -1 + y * -1) = 9
-7 + y + (-7 + -1y) = 9

Reorder the terms:
-7 + -7 + y + -1y = 9

Combine like terms: -7 + -7 = -14
-14 + y + -1y = 9

Combine like terms: y + -1y = 0
-14 + 0 = 9
-14 = 9

Solving
-14 = 9

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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