-21-4x=4x+18

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Solution for -21-4x=4x+18 equation:


Simplifying
-21 + -4x = 4x + 18

Reorder the terms:
-21 + -4x = 18 + 4x

Solving
-21 + -4x = 18 + 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 + -4x = 18 + 4x + -4x

Combine like terms: -4x + -4x = -8x
-21 + -8x = 18 + 4x + -4x

Combine like terms: 4x + -4x = 0
-21 + -8x = 18 + 0
-21 + -8x = 18

Add '21' to each side of the equation.
-21 + 21 + -8x = 18 + 21

Combine like terms: -21 + 21 = 0
0 + -8x = 18 + 21
-8x = 18 + 21

Combine like terms: 18 + 21 = 39
-8x = 39

Divide each side by '-8'.
x = -4.875

Simplifying
x = -4.875

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