X-3=4x-21

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Solution for X-3=4x-21 equation: 


Simplifying
X + -3 = 4x + -21

Reorder the terms:
-3 + X = 4x + -21

Reorder the terms:
-3 + X = -21 + 4x

Solving
-3 + X = -21 + 4x

Solving for variable 'X'.

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

Add '3' to each side of the equation.
-3 + 3 + X = -21 + 3 + 4x

Combine like terms: -3 + 3 = 0
0 + X = -21 + 3 + 4x
X = -21 + 3 + 4x

Combine like terms: -21 + 3 = -18
X = -18 + 4x

Simplifying
X = -18 + 4x

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