Respuesta :

Answer:

63

Step-by-step explanation:

Basically [x=8] when a letter (x) is directly by a number.

(8 × 8) - 1 = 64 - 1 = 63

8 × ? = (8 × 8) and 8 as in (x) then you can finish the question.

Answer:

8*7.875-1=63

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