-21=6x-4+x-1-3x

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Solution for -21=6x-4+x-1-3x equation:


Simplifying
-21 = 6x + -4 + x + -1 + -3x

Reorder the terms:
-21 = -4 + -1 + 6x + x + -3x

Combine like terms: -4 + -1 = -5
-21 = -5 + 6x + x + -3x

Combine like terms: 6x + x = 7x
-21 = -5 + 7x + -3x

Combine like terms: 7x + -3x = 4x
-21 = -5 + 4x

Solving
-21 = -5 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-21 + -4x = -5 + 4x + -4x

Combine like terms: 4x + -4x = 0
-21 + -4x = -5 + 0
-21 + -4x = -5

Add '21' to each side of the equation.
-21 + 21 + -4x = -5 + 21

Combine like terms: -21 + 21 = 0
0 + -4x = -5 + 21
-4x = -5 + 21

Combine like terms: -5 + 21 = 16
-4x = 16

Divide each side by '-4'.
x = -4

Simplifying
x = -4

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