105-4x=2x-21

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Solution for 105-4x=2x-21 equation:


Simplifying
105 + -4x = 2x + -21

Reorder the terms:
105 + -4x = -21 + 2x

Solving
105 + -4x = -21 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
105 + -4x + -2x = -21 + 2x + -2x

Combine like terms: -4x + -2x = -6x
105 + -6x = -21 + 2x + -2x

Combine like terms: 2x + -2x = 0
105 + -6x = -21 + 0
105 + -6x = -21

Add '-105' to each side of the equation.
105 + -105 + -6x = -21 + -105

Combine like terms: 105 + -105 = 0
0 + -6x = -21 + -105
-6x = -21 + -105

Combine like terms: -21 + -105 = -126
-6x = -126

Divide each side by '-6'.
x = 21

Simplifying
x = 21

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