-4x=3x-21

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Solution for -4x=3x-21 equation: 


Simplifying
-4x = 3x + -21

Reorder the terms:
-4x = -21 + 3x

Solving
-4x = -21 + 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.
-4x + -3x = -21 + 3x + -3x

Combine like terms: -4x + -3x = -7x
-7x = -21 + 3x + -3x

Combine like terms: 3x + -3x = 0
-7x = -21 + 0
-7x = -21

Divide each side by '-7'.
x = 3

Simplifying
x = 3

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