(9+10)+20=9+(10+20)

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Solution for (9+10)+20=9+(10+20) equation: 


Simplifying
(9 + 10) + 20 = 9 + (10 + 20)

Combine like terms: 9 + 10 = 19
(19) + 20 = 9 + (10 + 20)
19 + 20 = 9 + (10 + 20)

Combine like terms: 19 + 20 = 39
39 = 9 + (10 + 20)

Combine like terms: 10 + 20 = 30
39 = 9 + (30)
39 = 9 + 30

Combine like terms: 9 + 30 = 39
39 = 39

Add '-39' to each side of the equation.
39 + -39 = 39 + -39

Combine like terms: 39 + -39 = 0
0 = 39 + -39

Combine like terms: 39 + -39 = 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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