$2^x+2^{x+3}=6^2\cdot 2^{18}.$ What is the value of $x?$

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Vincen: Legendary Member; Posts: 2898; Joined: Thu Sep 07, 2017 2:49 pmFollowed by: 5 members; Thanked: 6 times

by Vincen » Wed Sep 30, 2020 6:08 am

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$2^x+2^{x+3}=6^2\cdot 2^{18}.$ What is the value of $x?$

A. 18
B. 20
C. 21
D. 22
E. 24

Answer: B

Source: Veritas Prep

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Source: Beat The GMAT — Problem Solving | Wed Sep 30, 2020 6:08 am

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