3x+9+x=4x+13-4

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Solution for 3x+9+x=4x+13-4 equation:


Simplifying
3x + 9 + x = 4x + 13 + -4

Reorder the terms:
9 + 3x + x = 4x + 13 + -4

Combine like terms: 3x + x = 4x
9 + 4x = 4x + 13 + -4

Reorder the terms:
9 + 4x = 13 + -4 + 4x

Combine like terms: 13 + -4 = 9
9 + 4x = 9 + 4x

Add '-9' to each side of the equation.
9 + -9 + 4x = 9 + -9 + 4x

Combine like terms: 9 + -9 = 0
0 + 4x = 9 + -9 + 4x
4x = 9 + -9 + 4x

Combine like terms: 9 + -9 = 0
4x = 0 + 4x
4x = 4x

Add '-4x' to each side of the equation.
4x + -4x = 4x + -4x

Combine like terms: 4x + -4x = 0
0 = 4x + -4x

Combine like terms: 4x + -4x = 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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