-21-5x=3x+12

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Solution for -21-5x=3x+12 equation:


Simplifying
-21 + -5x = 3x + 12

Reorder the terms:
-21 + -5x = 12 + 3x

Solving
-21 + -5x = 12 + 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 + -5x + -3x = 12 + 3x + -3x

Combine like terms: -5x + -3x = -8x
-21 + -8x = 12 + 3x + -3x

Combine like terms: 3x + -3x = 0
-21 + -8x = 12 + 0
-21 + -8x = 12

Add '21' to each side of the equation.
-21 + 21 + -8x = 12 + 21

Combine like terms: -21 + 21 = 0
0 + -8x = 12 + 21
-8x = 12 + 21

Combine like terms: 12 + 21 = 33
-8x = 33

Divide each side by '-8'.
x = -4.125

Simplifying
x = -4.125

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