21x+8-25x=1-9

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Solution for 21x+8-25x=1-9 equation:


Simplifying
21x + 8 + -25x = 1 + -9

Reorder the terms:
8 + 21x + -25x = 1 + -9

Combine like terms: 21x + -25x = -4x
8 + -4x = 1 + -9

Combine like terms: 1 + -9 = -8
8 + -4x = -8

Solving
8 + -4x = -8

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 = -8 + -8

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

Combine like terms: -8 + -8 = -16
-4x = -16

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

Simplifying
x = 4

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