(12-y)+(y+3)=15

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Solution for (12-y)+(y+3)=15 equation: 


Simplifying
(12 + -1y) + (y + 3) = 15

Remove parenthesis around (12 + -1y)
12 + -1y + (y + 3) = 15

Reorder the terms:
12 + -1y + (3 + y) = 15

Remove parenthesis around (3 + y)
12 + -1y + 3 + y = 15

Reorder the terms:
12 + 3 + -1y + y = 15

Combine like terms: 12 + 3 = 15
15 + -1y + y = 15

Combine like terms: -1y + y = 0
15 + 0 = 15
15 = 15

Add '-15' to each side of the equation.
15 + -15 = 15 + -15

Combine like terms: 15 + -15 = 0
0 = 15 + -15

Combine like terms: 15 + -15 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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