-21=6+3x

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Solution for -21=6+3x equation:


Simplifying
-21 = 6 + 3x

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

Combine like terms: 3x + -3x = 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 = 27
-3x = 27

Divide each side by '-3'.
x = -9

Simplifying
x = -9

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