9x+4x=(9+4)x

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


Simplifying
9x + 4x = (9 + 4) * x

Combine like terms: 9x + 4x = 13x
13x = (9 + 4) * x

Combine like terms: 9 + 4 = 13
13x = (13) * x

Add '-13x' to each side of the equation.
13x + -13x = 13x + -13x

Combine like terms: 13x + -13x = 0
0 = 13x + -13x

Combine like terms: 13x + -13x = 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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