7x-3=21x-3

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Solution for 7x-3=21x-3 equation:


Simplifying
7x + -3 = 21x + -3

Reorder the terms:
-3 + 7x = 21x + -3

Reorder the terms:
-3 + 7x = -3 + 21x

Add '3' to each side of the equation.
-3 + 3 + 7x = -3 + 3 + 21x

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

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

Solving
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.
7x + -21x = 21x + -21x

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

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

Divide each side by '-14'.
x = 0

Simplifying
x = 0

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