Question

es urgente doy corona

Answer 1

Respuesta:

$2 ^{x} + {2}^{x - 1} + {2}^{x - 2} = 56 \\ ( {2}^{2} + 2 + 1) \times {2}^{x - 2} = 56 \\ 7 \times {2}^{x - 2} = 56 \\ {2}^{x - 2} = 8 \\ {2}^{x - 2} = {2}^{3} \\ x - 2 = 3 \\ x = 5$

(☞ ͡° ͜ʖ ͡°)☞ espero q te ayude ^_^