21-3x-6=

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Solution for 21-3x-6= equation:


Simplifying
21 + -3x + -6 = 0

Reorder the terms:
21 + -6 + -3x = 0

Combine like terms: 21 + -6 = 15
15 + -3x = 0

Solving
15 + -3x = 0

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + -3x = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -3x = 0 + -15
-3x = 0 + -15

Combine like terms: 0 + -15 = -15
-3x = -15

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

Simplifying
x = 5

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