5x=2x+21

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Solution for 5x=2x+21 equation: 


Simplifying
5x = 2x + 21

Reorder the terms:
5x = 21 + 2x

Solving
5x = 21 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
5x + -2x = 21 + 2x + -2x

Combine like terms: 5x + -2x = 3x
3x = 21 + 2x + -2x

Combine like terms: 2x + -2x = 0
3x = 21 + 0
3x = 21

Divide each side by '3'.
x = 7

Simplifying
x = 7

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