21x+6-25x=3-9

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Solution for 21x+6-25x=3-9 equation:


Simplifying
21x + 6 + -25x = 3 + -9

Reorder the terms:
6 + 21x + -25x = 3 + -9

Combine like terms: 21x + -25x = -4x
6 + -4x = 3 + -9

Combine like terms: 3 + -9 = -6
6 + -4x = -6

Solving
6 + -4x = -6

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + -4x = -6 + -6

Combine like terms: 6 + -6 = 0
0 + -4x = -6 + -6
-4x = -6 + -6

Combine like terms: -6 + -6 = -12
-4x = -12

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

Simplifying
x = 3

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