Respuesta :

gmany

Answer:

[tex]\huge\boxed{x=21}[/tex]

Step-by-step explanation:

[tex]x:7=3\\\\\dfrac{x}{7}=3\qquad|\text{multiply both sides by 7}\\\\7\!\!\!\!\diagup\cdot\dfrac{x}{7\!\!\!\!\diagup}=7\cdot3\\\\x=21[/tex]