13-3x+2+6x-2x-2x-1=21

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Solution for 13-3x+2+6x-2x-2x-1=21 equation: 


Simplifying
13 + -3x + 2 + 6x + -2x + -2x + -1 = 21

Reorder the terms:
13 + 2 + -1 + -3x + 6x + -2x + -2x = 21

Combine like terms: 13 + 2 = 15
15 + -1 + -3x + 6x + -2x + -2x = 21

Combine like terms: 15 + -1 = 14
14 + -3x + 6x + -2x + -2x = 21

Combine like terms: -3x + 6x = 3x
14 + 3x + -2x + -2x = 21

Combine like terms: 3x + -2x = 1x
14 + 1x + -2x = 21

Combine like terms: 1x + -2x = -1x
14 + -1x = 21

Solving
14 + -1x = 21

Solving for variable 'x'.

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

Add '-14' to each side of the equation.
14 + -14 + -1x = 21 + -14

Combine like terms: 14 + -14 = 0
0 + -1x = 21 + -14
-1x = 21 + -14

Combine like terms: 21 + -14 = 7
-1x = 7

Divide each side by '-1'.
x = -7

Simplifying
x = -7

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