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22-03-2021
Mathematics

contestada

[tex]2^{x} + 2^{x - 2} + 2^{x} = 42[/tex]
solve for x

Respuesta :

22-03-2021

Step-by-step explanation:

[tex]2^{x} + 2^{x - 2} + 2^{x} = 42 [/tex]

[tex]x + (x - 2) + x = 42[/tex]

[tex]3x - 2 = 42[/tex]

[tex] {2}^{3x - 2} = 42[/tex]

x =3

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