X-8+X=13

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Solution for X-8+X=13 equation: 


Simplifying
X + -8 + X = 13

Reorder the terms:
-8 + X + X = 13

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

Solving
-8 + 2X = 13

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 + 2X = 13 + 8

Combine like terms: -8 + 8 = 0
0 + 2X = 13 + 8
2X = 13 + 8

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

Divide each side by '2'.
X = 10.5

Simplifying
X = 10.5

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