Respuesta :

Answer:

x = 2

Step-by-step explanation:

Convert 343 to the base of 7.

343 = 7³

7ˣ ⁺ ¹ = 7³

Ignore the 7's first to solve for x,

x + 1 = 3

x = 3 - 1

x = 2

Check

7²⁺¹ = 343

7³ = 343

343 = 343 (correct)

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