21x=3x+18

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Solution for 21x=3x+18 equation: 


Simplifying
21x = 3x + 18

Reorder the terms:
21x = 18 + 3x

Solving
21x = 18 + 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.
21x + -3x = 18 + 3x + -3x

Combine like terms: 21x + -3x = 18x
18x = 18 + 3x + -3x

Combine like terms: 3x + -3x = 0
18x = 18 + 0
18x = 18

Divide each side by '18'.
x = 1

Simplifying
x = 1

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