4x=21-9

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Solution for 4x=21-9 equation: 


Simplifying
4x = 21 + -9

Combine like terms: 21 + -9 = 12
4x = 12

Solving
4x = 12

Solving for variable 'x'.

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

Divide each side by '4'.
x = 3

Simplifying
x = 3

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