111-3x=3x+21

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Solution for 111-3x=3x+21 equation:


Simplifying
111 + -3x = 3x + 21

Reorder the terms:
111 + -3x = 21 + 3x

Solving
111 + -3x = 21 + 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.
111 + -3x + -3x = 21 + 3x + -3x

Combine like terms: -3x + -3x = -6x
111 + -6x = 21 + 3x + -3x

Combine like terms: 3x + -3x = 0
111 + -6x = 21 + 0
111 + -6x = 21

Add '-111' to each side of the equation.
111 + -111 + -6x = 21 + -111

Combine like terms: 111 + -111 = 0
0 + -6x = 21 + -111
-6x = 21 + -111

Combine like terms: 21 + -111 = -90
-6x = -90

Divide each side by '-6'.
x = 15

Simplifying
x = 15

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