7x+21x=

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Solution for 7x+21x= equation: 


Simplifying
7x + 21x = 0

Combine like terms: 7x + 21x = 28x
28x = 0

Solving
28x = 0

Solving for variable 'x'.

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

Divide each side by '28'.
x = 0

Simplifying
x = 0

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