Respuesta :

Answer:

0.3

Step-by-step explanation:

x is the number to be added to 0.7 to have a sum of 1.

[tex]0.7 + x = 1[/tex]

[tex]x = 1 - 0.7[/tex]

[tex]x = 0.3[/tex]

Answer:

0.3

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