X=-42+3X

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Solution for X=-42+3X equation: 


Simplifying
X = -42 + 3X

Solving
X = -42 + 3X

Solving for variable 'X'.

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

Add '-3X' to each side of the equation.
X + -3X = -42 + 3X + -3X

Combine like terms: X + -3X = -2X
-2X = -42 + 3X + -3X

Combine like terms: 3X + -3X = 0
-2X = -42 + 0
-2X = -42

Divide each side by '-2'.
X = 21

Simplifying
X = 21

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