21x-40=x

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Solution for 21x-40=x equation:


Simplifying
21x + -40 = x

Reorder the terms:
-40 + 21x = x

Solving
-40 + 21x = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-40 + 21x + -1x = x + -1x

Combine like terms: 21x + -1x = 20x
-40 + 20x = x + -1x

Combine like terms: x + -1x = 0
-40 + 20x = 0

Add '40' to each side of the equation.
-40 + 40 + 20x = 0 + 40

Combine like terms: -40 + 40 = 0
0 + 20x = 0 + 40
20x = 0 + 40

Combine like terms: 0 + 40 = 40
20x = 40

Divide each side by '20'.
x = 2

Simplifying
x = 2

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