X+1=400

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Solution for X+1=400 equation: 


Simplifying
X + 1 = 400

Reorder the terms:
1 + X = 400

Solving
1 + X = 400

Solving for variable 'X'.

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

Add '-1' to each side of the equation.
1 + -1 + X = 400 + -1

Combine like terms: 1 + -1 = 0
0 + X = 400 + -1
X = 400 + -1

Combine like terms: 400 + -1 = 399
X = 399

Simplifying
X = 399

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