(4+8)+9=4+(8+9)

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Solution for (4+8)+9=4+(8+9) equation: 


Simplifying
(4 + 8) + 9 = 4 + (8 + 9)

Combine like terms: 4 + 8 = 12
(12) + 9 = 4 + (8 + 9)
12 + 9 = 4 + (8 + 9)

Combine like terms: 12 + 9 = 21
21 = 4 + (8 + 9)

Combine like terms: 8 + 9 = 17
21 = 4 + (17)
21 = 4 + 17

Combine like terms: 4 + 17 = 21
21 = 21

Add '-21' to each side of the equation.
21 + -21 = 21 + -21

Combine like terms: 21 + -21 = 0
0 = 21 + -21

Combine like terms: 21 + -21 = 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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