X+8=2x+21

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Solution for X+8=2x+21 equation: 


Simplifying
X + 8 = 2x + 21

Reorder the terms:
8 + X = 2x + 21

Reorder the terms:
8 + X = 21 + 2x

Solving
8 + X = 21 + 2x

Solving for variable 'X'.

Move all terms containing X to the left, all other terms to the right.

Add '-8' to each side of the equation.
8 + -8 + X = 21 + -8 + 2x

Combine like terms: 8 + -8 = 0
0 + X = 21 + -8 + 2x
X = 21 + -8 + 2x

Combine like terms: 21 + -8 = 13
X = 13 + 2x

Simplifying
X = 13 + 2x

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