21x+8-25x=4-8

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Solution for 21x+8-25x=4-8 equation: 


Simplifying
21x + 8 + -25x = 4 + -8

Reorder the terms:
8 + 21x + -25x = 4 + -8

Combine like terms: 21x + -25x = -4x
8 + -4x = 4 + -8

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

Solving
8 + -4x = -4

Solving for variable 'x'.

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

Add '-8' to each side of the equation.
8 + -8 + -4x = -4 + -8

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

Combine like terms: -4 + -8 = -12
-4x = -12

Divide each side by '-4'.
x = 3

Simplifying
x = 3

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