Respuesta :

anastaciamaseda890

Answer:

x = 21/2

Step-by-step explanation:

Move all terms not containing  x to the right side of the equation.

3x=x+21

Move all terms containing  x to the left side of the equation.

2x=21

Divide each term by  

2

and simplify.

x = 21/2

SlightedDuck

Answer:

Step-by-step explanation:

x = 21/2

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