3x-21=6x-6

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Solution for 3x-21=6x-6 equation:


Simplifying
3x + -21 = 6x + -6

Reorder the terms:
-21 + 3x = 6x + -6

Reorder the terms:
-21 + 3x = -6 + 6x

Solving
-21 + 3x = -6 + 6x

Solving for variable 'x'.

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

Add '-6x' to each side of the equation.
-21 + 3x + -6x = -6 + 6x + -6x

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

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

Add '21' to each side of the equation.
-21 + 21 + -3x = -6 + 21

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

Combine like terms: -6 + 21 = 15
-3x = 15

Divide each side by '-3'.
x = -5

Simplifying
x = -5

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