21x-3=20x

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Solution for 21x-3=20x equation:


Simplifying
21x + -3 = 20x

Reorder the terms:
-3 + 21x = 20x

Solving
-3 + 21x = 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
-3 + 21x + -20x = 20x + -20x

Combine like terms: 21x + -20x = 1x
-3 + 1x = 20x + -20x

Combine like terms: 20x + -20x = 0
-3 + 1x = 0

Add '3' to each side of the equation.
-3 + 3 + 1x = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 1x = 0 + 3
1x = 0 + 3

Combine like terms: 0 + 3 = 3
1x = 3

Divide each side by '1'.
x = 3

Simplifying
x = 3

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