If $3^x+3^x+3^x=1,$ what is $x?$

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Gmat_mission: Legendary Member; Posts: 1622; Joined: Thu Mar 01, 2018 7:22 amFollowed by: 2 members

by Gmat_mission » Fri Feb 11, 2022 8:49 am

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If $3^x+3^x+3^x=1,$ what is $x?$

(A) $-1$

(B) $-\dfrac13$

(C) $0$

(D) $\dfrac13$

(E) $1$

Answer: A

Source: Manhattan GMAT

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Source: Beat The GMAT — Problem Solving | Fri Feb 11, 2022 8:49 am

regor60: Master | Next Rank: 500 Posts; Posts: 416; Joined: Thu Oct 15, 2009 11:52 am; Thanked: 27 times

Re: If $3^x+3^x+3^x=1,$ what is $x?$

by regor60 » Sun Feb 13, 2022 9:59 am

If 3 of the same thing add to 1, then each thing must be 1/3, meaning X=-1,A

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