21+8z+4z-16=18z+14-6z-9

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Solution for 21+8z+4z-16=18z+14-6z-9 equation: 


Simplifying
21 + 8z + 4z + -16 = 18z + 14 + -6z + -9

Reorder the terms:
21 + -16 + 8z + 4z = 18z + 14 + -6z + -9

Combine like terms: 21 + -16 = 5
5 + 8z + 4z = 18z + 14 + -6z + -9

Combine like terms: 8z + 4z = 12z
5 + 12z = 18z + 14 + -6z + -9

Reorder the terms:
5 + 12z = 14 + -9 + 18z + -6z

Combine like terms: 14 + -9 = 5
5 + 12z = 5 + 18z + -6z

Combine like terms: 18z + -6z = 12z
5 + 12z = 5 + 12z

Add '-5' to each side of the equation.
5 + -5 + 12z = 5 + -5 + 12z

Combine like terms: 5 + -5 = 0
0 + 12z = 5 + -5 + 12z
12z = 5 + -5 + 12z

Combine like terms: 5 + -5 = 0
12z = 0 + 12z
12z = 12z

Add '-12z' to each side of the equation.
12z + -12z = 12z + -12z

Combine like terms: 12z + -12z = 0
0 = 12z + -12z

Combine like terms: 12z + -12z = 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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