7x-4=21x

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Solution for 7x-4=21x equation:


Simplifying
7x + -4 = 21x

Reorder the terms:
-4 + 7x = 21x

Solving
-4 + 7x = 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
-4 + 7x + -21x = 21x + -21x

Combine like terms: 7x + -21x = -14x
-4 + -14x = 21x + -21x

Combine like terms: 21x + -21x = 0
-4 + -14x = 0

Add '4' to each side of the equation.
-4 + 4 + -14x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -14x = 0 + 4
-14x = 0 + 4

Combine like terms: 0 + 4 = 4
-14x = 4

Divide each side by '-14'.
x = -0.2857142857

Simplifying
x = -0.2857142857

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