123+456=X+456

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Solution for 123+456=X+456 equation:


Simplifying
123 + 456 = X + 456

Combine like terms: 123 + 456 = 579
579 = X + 456

Reorder the terms:
579 = 456 + X

Solving
579 = 456 + X

Solving for variable 'X'.

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

Add '-1X' to each side of the equation.
579 + -1X = 456 + X + -1X

Combine like terms: X + -1X = 0
579 + -1X = 456 + 0
579 + -1X = 456

Add '-579' to each side of the equation.
579 + -579 + -1X = 456 + -579

Combine like terms: 579 + -579 = 0
0 + -1X = 456 + -579
-1X = 456 + -579

Combine like terms: 456 + -579 = -123
-1X = -123

Divide each side by '-1'.
X = 123

Simplifying
X = 123

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