-3x-21=-5+x

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Solution for -3x-21=-5+x equation:


Simplifying
-3x + -21 = -5 + x

Reorder the terms:
-21 + -3x = -5 + x

Solving
-21 + -3x = -5 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-21 + -3x + -1x = -5 + x + -1x

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

Combine like terms: x + -1x = 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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